The National Palace of Culture (Bulgarian: Национален дворец на културата, Natsionalen dvorets na kulturata; abbreviated as НДК, NDK), located in Sofia, the capital of Bulgaria, is the largest multifunctional congress, conference, convention and exhibition centre in Southeastern Europe. It was opened in 1981.
In July 2005, the National Palace of Culture was proclaimed the best congress centre in the world for the year by the International Organization of Congress Centres .
The congress centre has a wide variety of technical equipment at its disposal in order to host different types of events, such as concerts, conferences, exhibitions and shows. It has an area of 123,000 m² on eight floors and three underground levels. The National Palace of Culture has 13 halls and 15,000 m² of exhibition area, a trade centre and a car park. Sofia Film Fest, an annual film festival held in the capital of Bulgaria, Sofia takes place in NDK.
Curiously, more than 10,000 tons of steel were used for the construction of the NDK - 3,000 more than the Eiffel Tower.