This palace was built in the 17th century by the Radziwiłł family (into which Jackie Kennedy's sister Lee later married). In the 19th century it functioned as the administrative office of the czarist occupiers—hence its present name. In 1955 the Warsaw Pact was signed here; later the palace served as the headquarters for the Presidium of the Council of Ministers, and since 1995 it has been the official residence of Poland's president. In the forecourt is an equestrian statue of Prince Józef Poniatowski, a nephew of the last king of Poland and one of Napoléon's marshals. He was wounded and drowned in the Elster River during the Battle of Leipzig in 1813, following the disastrous retreat of Napoléon's Grande Armée from Russia. You can't visit the inside, unfortunately.
Krakowskie Przedmieście 46–48, Warsaw, Poland