The 25 May Sportcenter in Belgrade is located at the Danube river and a indoor swimming pools, a restaurant with a bowling hall, a sauna and outdoor sports grounds. It was constructed by Ivan Antic in 1973-75.

The highlight of the building is the restaurant supported on 19 m cantilevers that gives a special feature to this architectural piece.The roof of the covered Olympic swimming pool is made of prestressed concrete hyperbolic parabolic shell, 7 cm thick on the rhombus base, with the span over the longer diagonal 107 m and over the shorter 60 m. In the lowest points of the roof shell the inclined columnal "abutments' are formed witch are interconnected by prestressed concrete tie beams.