Iron-Gate Square is a large open space in the city center of Warsaw. The square took its name from a large iron gate that once secured the western boundary of the Saxon Garden.
Wikipedia https://en.wikipedia.org/wiki/Iron-Gate_Square
Official Website http://www.um.warszawa.pl/o-warszawie/kompendium-wiedzy/plac-zelaznej-bramy
Address 10 Plac Żelaznej Bramy, Warszawa 00-136, Poland
Coordinates 52°14'22.918" N 21°0'10.075" E