Tancici Dum, Prague, CZ, 2008

This is one of the most famous, if not the most famous, post-1989 building in Prague. This is what Wikipedia has to say about it:

"The Dancing House (Czech: Tančící dům) is the nickname given to the Nationale-Nederlanden building in downtown Prague, Czech Republic at Rašínovo nábřeží 80, 120 00 Praha 2. It was designed by Yugoslavian-born Czech architect Vlado Milunić in co-operation with Canadian architect Frank Gehry on a vacant riverfront plot (where the previous building had been destroyed during the Bombing of Prague in 1945). The building was designed in 1992 and completed in 1996.[1]
side view

The very non-traditional design was controversial at the time. Czech president Václav Havel, who lived for decades next to the site, had supported it, hoping that the building would become a center of cultural activity.

Originally named Fred and Ginger (after Fred Astaire and Ginger Rogers - the house vaguely resembles a pair of dancers) the house stands out among the Neo-Baroque, Neo-Gothic and Art Nouveau buildings for which Prague is famous. Others have nicknamed it "Drunk House".

On the roof is a French restaurant with magnificent views of the city. The building's other tenants include several multinational firms. (The plans for a cultural center were not realized.)"