This structure with an astonishing facade served as the main entrance to the city of Gdansk. Notice three coats of arms on it.
Wikipedia (Polish) http://pl.wikipedia.org/wiki/Brama_Wy%C5%BCynna_w_Gda%C5%84sku
Address Wały Jagiellońskie 2A, Gdańsk, Poland
Coordinates 54°20'59.747" N 18°38'47.484" E