Parade Square is a square in downtown Warsaw. Located between ulica Świętokrzyska in the north, Aleje Jerozolimskie in the south, ulica Marszałkowska in the east and the monumental Palace of Culture and Science to the west, it is one of Warsaw's central squares. It's one of the largest city squares in the world, and the second largest in the European Union, after the Alexanderplatz in Berlin, Germany.
It is one of the youngest squares in Warsaw, built in the 1950s together with the Palace of Culture and Science. It was used extensively by the government of People's Republic of Poland for various propaganda parades. The biggest parade held was in 1966 to mark the millennium year of the Polish nation.
Wikipedia https://en.wikipedia.org/wiki/Parade_Square
Official Website http://www.um.warszawa.pl/o-warszawie/kompendium-wiedzy/plac-defilad
Address Plac Defilad, Warszawa 00-110, Poland
Coordinates 52°13'55.123" N 21°0'30.62" E