Boathotel Fortuna
Location.
Boathotel Fortuna is located in the Ujlipotvaros neighborhood of Budapest, close to WestEnd City Center, Parliament Building, and Hungarian State Opera House. Nearby points of interest also include St. Stephen's Basilica and Heroe's Square.
Hotel Features.
Dining options at Boathotel Fortuna include a restaurant and a bar/lounge. Room service is available during limited hours. A complimentary hot and cold buffet breakfast is served daily. Complimentary wireless Internet access is available in public areas. This Budapest property has event space consisting of banquet facilities and small meeting rooms. The property offers an airport shuttle (surcharge). Additional property amenities include multilingual staff and a safe deposit box at the front desk.
Guestrooms.
There are 42 guestrooms at Boathotel Fortuna. Guestrooms have city, river, or water views.
Notifications and Fees:
- No onsite parking is available.
The following fees and deposits are charged by the property at time of service, check in, or check out.
- Self parking: EUR 9 per day
- Rollaway bed: EUR 25 per night
The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.
Lions Garden Hotel
Location.
Lions Garden Hotel is located in the Erzsebetvaros neighborhood of Budapest, close to Ferenc Puskas Stadium, Vajdahunyad Castle, and Heroe's Square. Nearby points of interest also include Szechenyi Medicinal Bath and Hungarian State Opera House.
Hotel Features.
Dining options at Lions Garden Hotel include a restaurant and a bar/lounge. Room service is available during limited hours. A complimentary full breakfast is served daily. Recreational amenities include an indoor pool, a sauna, and a fitness facility. There is a full service health spa on site. This 4.0 star property has a business center and offers small meeting rooms and audio visual equipment. Complimentary wireless Internet access is available in public areas. The property offers an airport shuttle (surcharge). Guest parking is available for a surcharge. Additional property amenities include barbecue grills and laundry facilities. This is a smoke free property.
Guestrooms.
There are 107 guestrooms at Lions Garden Hotel. Bathrooms feature handheld showerheads, makeup/shaving mirrors, and hair dryers. Wireless Internet access is available for a surcharge; guestrooms also offer direct dial phones, desks, and in room safes. Televisions have satellite channels and pay movies. Air conditioned rooms also include minibars and blackout drapes/curtains. Guests may request wake up calls. Guestrooms are all non smoking.
Notifications and Fees:
The following fees and deposits are charged by the property at time of service, check in, or check out.
- Self parking: EUR 15 per night
The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.
Alfa Art Hotel
Location.
Located in Budapest, Alfa Art Hotel is near the airport and close to Megyeri Bridge, Aquincum, and Aquaworld Budapest. Additional area points of interest include Szechenyi Medicinal Bath and Vajdahunyad Castle.
Features.
Dining options at Alfa Art Hotel include a restaurant and a bar/lounge. Room service is available during limited hours. A complimentary breakfast is served daily. Recreational amenities include a sauna. This 3.0 star property offers limo/town car service and business services. Complimentary wireless Internet access is available in public areas. This Budapest property has event space consisting of banquet facilities, conference/meeting rooms, and exhibit space. The property offers an airport shuttle (surcharge). Wedding services and concierge services are available. Guest parking is complimentary. Additional property amenities include multilingual staff and express check in. This is a smoke free property.
Guestrooms.
There are 42 guestrooms at Alfa Art Hotel. Guestrooms have river or garden views. Bathrooms feature showers and hair dryers. In addition to complimentary wireless Internet access, guestrooms offer direct dial phones and in room safes. Televisions have satellite channels. Air conditioned rooms also include desks and minibars. Guests may request irons/ironing boards, extra towels/bedding, and wake up calls. Housekeeping is available. Guestrooms are all non smoking.
Notifications and Fees:
The following fees and deposits are charged by the property at time of service, check in, or check out.
- Pets: HUF 4000 per pet, per night
- Rollaway bed: HUF 7000 per night
The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.
Central Basilica Hotel
Location.
Central Basilica Hotel is located in central Budapest, close to St. Stephen's Basilica, Hungarian State Opera House, and Szechenyi Chain Bridge. Nearby points of interest also include Parliament Building and Buda Castle.
Features.
This 3.0 star property offers small meeting rooms and limo/town car service. This Budapest property has 40 square meters of event space consisting of banquet facilities and conference/meeting rooms. For a surcharge, the property offers an airport shuttle (available on request). A complimentary hot and cold buffet breakfast is served daily. Room service is available during limited hours. Additional property amenities include multilingual staff and laundry facilities. This is a smoke free property. A total renovation of this property was completed in April 2007.
Guestrooms.
There are 46 guestrooms at Central Basilica Hotel. Bathrooms feature complimentary toiletries and hair dryers. In addition to complimentary high speed (wired) Internet access, guestrooms offer phones and in room safes. Televisions have satellite channels. Air conditioned rooms also include minibars, blackout drapes/curtains, and electronic/magnetic keys. Guests may request irons/ironing boards, extra towels/bedding, and wake up calls. Housekeeping is available. Cribs (infant beds) and rollaway beds are available on request. Guestrooms are all non smoking.
Notifications and Fees:
The following fees and deposits are charged by the property at time of service, check in, or check out.
- Pets: HUF 5600 per night
- Early check in: HUF 8500
- Rollaway bed: HUF 8500 per night
The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.
Corinthia Hotel Budapest
Location.
Corinthia Hotel Budapest is located in the Erzsebetvaros neighborhood of Budapest, close to Franz Liszt Academy of Music, Hungarian State Opera House, and St. Stephen's Basilica. Nearby points of interest also include Hungarian National Museum and Heroe's Square.
Hotel Features.
Corinthia Hotel Budapest features a restaurant and a bar/lounge. Room service is available 24 hours a day. Recreational amenities include an indoor pool, a spa tub, a sauna, and a steam room. The property's full service health spa has massage/treatment rooms and beauty services. This 5.0 star property has a business center and offers audio visual equipment and business services. Wireless Internet access is available in public areas. This Budapest property has event space consisting of banquet facilities, conference/meeting rooms, a ballroom, and exhibit space. The property offers an airport shuttle (surcharge). Guest parking is available for a surcharge. Additional property amenities include valet parking, a concierge desk, and multilingual staff.
Guestrooms.
There are 414 guestrooms at Corinthia Hotel Budapest. Bathrooms feature shower/tub combinations, bathrobes, slippers, and scales. Internet access (surcharge) is provided. In addition to desks and in room safes, guestrooms offer direct dial phones. Televisions have satellite channels and pay movies. Air conditioned rooms also include blackout drapes/curtains and electronic/magnetic keys. Guests may request irons/ironing boards and wake up calls. A nightly turndown service is offered and housekeeping is available daily. Cribs (infant beds) and rollaway beds are available on request.
HUNGUEST HOTEL BEKE THE HOTEL OFFERS RESTAURANT BAR 24 HOUR FRONTDESK NEWSPAPERS NON SMOKING ROOMS ELEVATOR SAFETY DEPOSITBOX SHOPS IN HOTEL.
Mercure Budapest City Centre
Location.
Mercure Budapest City Centre is located in central Budapest, close to Vaci utca, Rudas Baths, and St. Stephen's Basilica. Nearby points of interest also include Szechenyi Chain Bridge and Hungarian National Museum.
Features.
This 4.0 star property has a business center and offers limo/town car service and business services. Complimentary wireless Internet access is available in public areas. The property offers an airport shuttle (surcharge). Room service is available 24 hours a day. Guest parking is available for a surcharge. Additional property amenities include a bar/lounge, a coffee shop/café, and a concierge desk.
Guestrooms.
There are 227 guestrooms at Mercure Budapest City Centre. Bathrooms feature shower/tub combinations, complimentary toiletries, and hair dryers. In addition to complimentary wireless Internet access, guestrooms offer direct dial phones, voice mail, and in room safes. Televisions have cable channels. Air conditioned rooms also include desks, minibars, blackout drapes/curtains, and electronic/magnetic keys. Housekeeping is offered and guests may request wake up calls.
Notifications and Fees:
The following mandatory hotel imposed fees are charged and collected by the hotel either at check in or check out.
- 4 percent city/local tax will be charged
- Resort fee: 4 percent of room rate
The following fees and deposits are charged by the property at time of service, check in, or check out.
- Self parking: HUF 6000 per night
The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.
Danubius Health Spa Resort Helia
Location.
Danubius Health Spa Resort Helia is a business friendly hotel located in central Budapest, close to Margaret Island, Parliament Building, and Heroe's Square. Additional points of interest include Szechenyi Medicinal Bath and Vajdahunyad Castle.
Features.
Dining options at Danubius Health Spa Resort Helia include a restaurant. Room service is available during limited hours. Recreational amenities include an indoor pool, a health club, a spa tub, a sauna, and a fitness facility. The property's full service health spa has massage/treatment rooms, facials, and beauty services. This 4.0 star property has a business center and offers small meeting rooms, secretarial services, and technology support staff. Wireless Internet access (surcharge) is available in public areas. This Budapest property has 1184 square feet of event space consisting of banquet facilities, conference/meeting rooms, a ballroom, and exhibit space. The property offers an airport shuttle (surcharge). Guest parking is available for a surcharge. Additional property amenities include a poolside bar, a coffee shop/café, and a concierge desk. A total renovation of this property was completed in 2008.
Guestrooms.
There are 262 guestrooms at Danubius Health Spa Resort Helia. Guestrooms have city or river views. Coffee/tea makers and minibars are offered. Bathrooms feature shower/tub combinations with handheld showerheads. They also offer bathrobes, complimentary toiletries, and hair dryers. Wireless Internet access is available for a surcharge; guestrooms also offer direct dial phones, voice mail, and in room safes (accommodate laptops). Televisions have satellite channels and pay movies. Air conditioned rooms also include desks, blackout drapes/curtains, electronic/magnetic keys, and clock radios. Guests may request a turndown service, irons/ironing boards, and wake up calls. Housekeeping is available. Cribs (infant beds) are available on request.
Notifications and Fees:
The following fees and deposits are charged by the property at time of service, check in, or check out.
- Self parking: HUF 2700 per night
- Pets: HUF 7000 per pet, per night
- Wireless Internet in business center: HUF 1000 (for 30 minutes, rates may vary)
- Wireless Internet in public areas: HUF 1000 (for 30 minutes, rates may vary)
- In room wireless Internet: HUF 1000 (for 30 minutes, rates may vary)
- Buffet breakfast: HUF 2700 per person (approximate amount)
The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.
Best Western Hotel Art
Location.
Best Western Hotel Art is located in central Budapest, close to Eotvos Lorand University, Hungarian National Museum, and Gellert Thermal Baths and Swimming Pool. Nearby points of interest also include Rudas Baths and St. Stephen's Basilica.
Hotel Features.
Recreational amenities include a sauna and a fitness facility. This 3.0 star property offers small meeting rooms, audio visual equipment, and business services. Complimentary wireless Internet access is available in public areas. This Budapest property has 40 square meters of event space. For a surcharge, the property offers an airport shuttle (available on request). Other property amenities at this Art Deco property include multilingual staff, tour/ticket assistance, and shopping on site.
Guestrooms.
There are 32 guestrooms at Best Western Hotel Art. Guestrooms have city views. Rooms are individually decorated and furnished. Beds come with Select Comfort mattresses and premium bedding. Refrigerators, coffee/tea makers, and minibars are offered. Bathrooms feature showers, complimentary toiletries, and hair dryers. In addition to complimentary wireless Internet access, guestrooms offer phones, desks, and in room safes. 60 cm LCD televisions have satellite channels. Air conditioned rooms also include blackout drapes/curtains, electronic/magnetic keys, trouser presses, and irons/ironing boards. A turndown service is available nightly, housekeeping is offered, and guests may request wake up calls. Cribs (infant beds) and rollaway beds are available on request.
Notifications and Fees:
The following mandatory hotel imposed fees are charged and collected by the hotel either at check in or check out.
- 4 percent city/local tax will be charged
The following fees and deposits are charged by the property at time of service, check in, or check out.
- Pet fee: HUF 7000 per night
- Late check out: HUF 10000
- Rollaway bed: HUF 8000 per night
The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.
Novotel Szeged
Location.
Located in Szeged, Novotel Szeged is on a river.
Hotel Features.
Dining options at Novotel Szeged include a restaurant and a bar/lounge. Room service is available during limited hours. Recreational amenities include a sauna and a children's club. This 4.0 star property offers small meeting rooms, a technology helpdesk, and audio visual equipment. Wireless Internet access is available in public areas. This Szeged property has event space consisting of banquet facilities, conference/meeting rooms, a ballroom, and exhibit space. The property offers an airport shuttle (surcharge). Guest parking is complimentary. Additional property amenities include multilingual staff, gift shops/newsstands, and laundry facilities.
Guestrooms.
There are 136 guestrooms at Novotel Szeged. Guestrooms have balconies. Furnishings include desks and sofa beds. Refrigerators and minibars are offered. Bathrooms feature hair dryers. Guestrooms offer direct dial phones and in room safes. Televisions have satellite channels and pay movies. Air conditioned rooms also include welcome amenities and electronic/magnetic keys. Guests may request irons/ironing boards and wake up calls. Housekeeping is available. Cribs (infant beds) and rollaway beds are available on request.
Notifications and Fees:
The following mandatory hotel imposed fees are charged and collected by the hotel either at check in or check out.
- City/local tax: HUF 410 per person, per night
Additional fees and deposits may be charged by the property at time of service, check in, or check out.
Danubius Hotel Flamenco
Location.
Located in Budapest, Danubius Hotel Flamenco is in the suburbs and close to Gellert Thermal Baths and Swimming Pool, Rudas Baths, and Buda Castle. Nearby points of interest also include Hungarian National Museum and Szechenyi Chain Bridge.
Features.
Dining options at Danubius Hotel Flamenco include a restaurant and a bar/lounge. Room service is available during limited hours. Recreational amenities include an indoor pool, a health club, a sauna, and a fitness facility. Spa amenities include spa services, massage/treatment rooms, beauty services, and a hair salon. This 4.0 star property offers small meeting rooms, secretarial services, and a technology helpdesk. Wireless Internet access (surcharge) is available in public areas. This Budapest property has event space consisting of banquet facilities, conference/meeting rooms, a ballroom, and exhibit space. Business services, wedding services, concierge services, and limo/town car service are available. Guest parking is available for a surcharge. Additional property amenities include a coffee shop/café, barbecue grills, and multilingual staff.
Guestrooms.
There are 355 guestrooms at Danubius Hotel Flamenco. Guestrooms have city views. Beds come with down comforters and premium bedding. Bathrooms feature shower/tub combinations with handheld showerheads. They also offer makeup/shaving mirrors, bathrobes, and slippers. Wireless Internet access is available for a surcharge; guestrooms also offer direct dial phones and in room safes. Televisions have premium satellite channels and pay movies. Air conditioned rooms also include desks, minibars, blackout drapes/curtains, and electronic/magnetic keys. Guests may request hypo allergenic bedding, extra towels/bedding, and wake up calls. Housekeeping is available. Cribs (infant beds) and rollaway beds are available on request.
Notifications and Fees:
The following fees and deposits are charged by the property at time of service, check in, or check out.
- Pets: HUF 5000 per night
- Wireless Internet in business center: HUF 2000 (for 2 hours, rates may vary) )
- Wireless Internet in public areas: HUF 2000 (for 2 hours, rates may vary)
- In room wireless Internet: HUF 2000 (for 2 hours, rates may vary)
The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.
Hotel Palazzo Zichy
Location.
Hotel Palazzo Zichy is located in central Budapest, close to Museum of Applied Arts, Hungarian National Museum, and Gellert Thermal Baths and Swimming Pool. Nearby points of interest also include Hungarian State Opera House and Rudas Baths.
Features.
Recreational amenities include a sauna and a fitness facility. This 4.0 star property has a business center and offers small meeting rooms, a technology helpdesk, and audio visual equipment. Complimentary wireless and wired high speed Internet access is available in public areas. This Budapest property has 3 meeting rooms. A complimentary Buffet breakfast is served daily. The property offers an airport shuttle (surcharge). Business services, wedding services, and tour/ticket assistance are available. Additional property amenities include a bar/lounge, a coffee shop/café, and a concierge desk. The property has designated areas for smoking.
Guestrooms.
There are 80 guestrooms at Hotel Palazzo Zichy. Refrigerators and minibars are offered. Bathrooms feature shower/tub combinations with handheld showerheads. They also offer bidets, makeup/shaving mirrors, and complimentary toiletries. In addition to complimentary wireless and wired high speed Internet access, guestrooms offer speakerphones, voice mail, and in room safes (accommodate laptops). High definition televisions have satellite channels. Air conditioned rooms also include desks, blackout drapes/curtains, and electronic/magnetic keys. Housekeeping is offered and guests may request hypo allergenic bedding. Cribs (infant beds) are available on request.
Notifications and Fees:
The following mandatory hotel imposed fees are charged and collected by the hotel either at check in or check out.
- City/local tax: HUF 431 per person, per night
Additional fees and deposits may be charged by the property at time of service, check in, or check out.
Boathotel Fortuna
Location.
Boathotel Fortuna is located in the Ujlipotvaros neighborhood of Budapest, close to WestEnd City Center, Parliament Building, and Hungarian State Opera House. Nearby points of interest also include St. Stephen's Basilica and Heroe's Square.
Hotel Features.
Dining options at Boathotel Fortuna include a restaurant and a bar/lounge. Room service is available during limited hours. A complimentary hot and cold buffet breakfast is served daily. Complimentary wireless Internet access is available in public areas. This Budapest property has event space consisting of banquet facilities and small meeting rooms. The property offers an airport shuttle (surcharge). Additional property amenities include multilingual staff and a safe deposit box at the front desk.
Guestrooms.
There are 42 guestrooms at Boathotel Fortuna. Guestrooms have city, river, or water views.
Notifications and Fees:
- No onsite parking is available.
The following fees and deposits are charged by the property at time of service, check in, or check out.
- Self parking: EUR 9 per day
- Rollaway bed: EUR 25 per night
The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.
Danubius Health Spa Resort Helia
Location.
Danubius Health Spa Resort Helia is a business friendly hotel located in central Budapest, close to Margaret Island, Parliament Building, and Heroe's Square. Additional points of interest include Szechenyi Medicinal Bath and Vajdahunyad Castle.
Features.
Dining options at Danubius Health Spa Resort Helia include a restaurant. Room service is available during limited hours. Recreational amenities include an indoor pool, a health club, a spa tub, a sauna, and a fitness facility. The property's full service health spa has massage/treatment rooms, facials, and beauty services. This 4.0 star property has a business center and offers small meeting rooms, secretarial services, and technology support staff. Wireless Internet access (surcharge) is available in public areas. This Budapest property has 1184 square feet of event space consisting of banquet facilities, conference/meeting rooms, a ballroom, and exhibit space. The property offers an airport shuttle (surcharge). Guest parking is available for a surcharge. Additional property amenities include a poolside bar, a coffee shop/café, and a concierge desk. A total renovation of this property was completed in 2008.
Guestrooms.
There are 262 guestrooms at Danubius Health Spa Resort Helia. Guestrooms have city or river views. Coffee/tea makers and minibars are offered. Bathrooms feature shower/tub combinations with handheld showerheads. They also offer bathrobes, complimentary toiletries, and hair dryers. Wireless Internet access is available for a surcharge; guestrooms also offer direct dial phones, voice mail, and in room safes (accommodate laptops). Televisions have satellite channels and pay movies. Air conditioned rooms also include desks, blackout drapes/curtains, electronic/magnetic keys, and clock radios. Guests may request a turndown service, irons/ironing boards, and wake up calls. Housekeeping is available. Cribs (infant beds) are available on request.
Notifications and Fees:
The following fees and deposits are charged by the property at time of service, check in, or check out.
- Self parking: HUF 2700 per night
- Pets: HUF 7000 per pet, per night
- Wireless Internet in business center: HUF 1000 (for 30 minutes, rates may vary)
- Wireless Internet in public areas: HUF 1000 (for 30 minutes, rates may vary)
- In room wireless Internet: HUF 1000 (for 30 minutes, rates may vary)
- Buffet breakfast: HUF 2700 per person (approximate amount)
The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.
Hungary meeting facilities - Nothing but the best for our clients
Training. New product launches. Public Relations. Press relations. Shareholder meetings. Birthdays and anniversaries, memorials and family celebrations. Training and teaching. You name it, we've got the perfect Hungary venue. From smart to funky, businesslike to fun, professional to magical, we've got the ideal venue for your meeting.
Submit your conference or meeting venue enquiry and we'll get on to it right away:
Your trusted local Hungary conference venue partner
Latest: Friday 4th November 2011: Call us now or send in your details in complete confidence using the form on this page. The more information about your conference or meeting event you can provide, the better targeted our first line response will be. You can upload documents including Word, Excel or PDFs with details of your meeting or conference brief and one of our experienced team will swing into action within minutes on your behalf and will revert with options and prices. Conferences and meetings is what we do, so we can save you more than time and money - our experience, reliability and confident hands-on approach takes away the stress that naturally comes with the responsibility for making the right conference venue or meeting room arrangements for your event.
Top Hungary Conference Venues
For anything and everything for conferences and meetings, charity events, gala dinners, board meetings, sales meetings, exhibitions, annual conferences, AGMs, product launches, corporate team building, training courses, parties and social functions - rely on us to organise it professionally and efficiently. We commit to meet your brief and exceed your expectations - on time and on budget. Send us as much information as you can and we will revert with prices, availability, and options, in confidence, according to your budget and specific conference needs.
Hungary conference facilities - The best in the business
Do you need Hungary conference rooms with natural light? Are you organising an international conference, national sales meeting, shareholder meeting, wedding, family event or AGM? Whatever your needs it's our job to do the leg work, working closely with you to create an unforgettable event. Do you need break-out rooms? Projectors? Speciast IT and AV equipment? Transport to and from the venue? Airport transfers? Because we're on the ground in Hungary and have considerable local knowledge and expertise, we're your top Hungary conference rooms partner.
Meeting venues in Hungary - Discover the best venues in town
It's our job to oversee the entire experience for you - if you want us to! Use us to recommend the best venues if you like, and leave it at that. Or get us involved at a deeper level. We're happy to help with arranging transfers and transport, accommodation and catering, plus any special Hungary meeting facilities you need like audio visual and IT equipment. No worries!
Popular meeting space layouts
U-Shape
- Seating around three sides of the room - good for presentations from front
- Square layout conducive to discussion
- Presentation space in the middle of the room
Boardroom style
- Centrally located table
- Classic layout ideal for debate and discussion
- Popular for smaller meetings
Theatre style
- Used for product launches, presentations, displays
- Use to present to large numbers of delegates
- Allows for optimal room occupancy
Classroom style
- Used to present to small to medium groups
- Delegates (in ones or twos) have own workspace
- Ideal for testing and individual training
Herringbone classroom style
- Tables angled towards centre
- Allows more disussion than ordinary classroom layout
Cabaret style (also known as cafe or bistro style)
- All delegates facing front-centre on round tables
- Large space in the middle of the room
- Ideal for small group work
Dinner dance layout
- Tables around the outside of the room
- Dancefloor in central area
- Used mostly for weddings and evening entertainment
Researching venues can involve considerable time and hassle. We'll take the strain, even if you're on a tight schedule. We shorten the whole process by finding suitable meeting rooms for your meeting, conference or event. Take a tour of our comprehensive listings and see what's available right now. Best of all, you can book your meeting room or venue in just three easy steps.
Request a callback from our Hungary local expert: you'll be glad you did!
Submit your enquiry below and Penny Smith from Conference Hungary will call you back. We aim to respond to all enquiries within 15 minutes. Or if you prefer please call to talk directly to us.
You're one click away from your ideal destination venue! We've got more than 40,000 venues at our fingertips for conferences, events and meetings. We can help you get exactly what you need, on time and on budget. Scroll down to view some example venues. If you would like further information, simply enter your name, email and telephone number and send the enquiry and one of our destination experts will get back to you - usually within 15 minutes.
From a small meeting or training course to a major international conference, we'll take the time to learn about your business and become an extension of your organisation. With our expert knowledge of venues, hotels, transportation networks and unique local attractions, we will source and book everything for you, arrange the entire itinerary, look after the invitations and add that extra ingredient to ensure a unique event.
