The National Palace of Culture - Congress Centre Sofia (NDK) is the largest multifunctional complex in Southeastern Europe. The Palace was officially opened in 1981 to mark 1300 years since the founding of the Bulgarian state. It was designed to host a wide range of events such as international conventions, official meetings, conferences, symposia, discussion panels, exhibitions, festivals, concerts. The Palace is located in downtown Sofia and is surrounded by a park area. The main building was designed by arch. Alexander Barov and his team of architects, and the design of the surrounding areas is the work of arch. Atanas Agura and team. The park area was designed by landscape architect Valentina Atanassova. Ref. https://www.ndk.bg/About+Us/About+NDK-55EN.html