Grzybowski Square () is a triangular square in the Śródmieście (downtown) district of Warsaw, Poland, between Twarda, Bagno, Grzybowska and Królewska streets. History 17th to 19th centuries The square's history goes back to the early 17th century, when it was an undeveloped space at a crossroads leading to the Ujazdów Castle, the village of Służewiec and the Old Town. From the mid-17th century it became the market square then assumed Jurydyka status named Grzybów after the owner, Jan Grzybowski. From 1786 to 1787, a town hall designed by Karol Schütz was built on the site. In 1791 it became part of the Warsaw area. The town hall building housed a prison from 1809 to 1830. After the demolition of the town hall, a grain market was created at the site, which ran until the end of the 19th century. Also from 1815, the square was gradually built up in neoclassical style, with some of its buildings designed by famous architects such as Antonio Corazzi and Fryderyk Albert Lessel. Overlooking the square, the streets also took on a uniform, neoclassical appearance, and from 1830 the market was called Grzybowski. On 29 October 1863, during the January uprising, the Russians executed several insurgents in the square: Franciszek Trzaska, Górski, Filkiewicz, and Chojnacki. During this period, Jewish people lived in the area, and it was famous for its many small shops offering articles of ironwork. From 1866, there was a loop line running through the square to Warsaw, which were replaced by double decker buses in 1880, then horse trams, and after 1908, electric trams. Even earlier, in 1855, the new Warsaw aqueduct, built and designed by Henryk Marconi, went through the square. Electric lighting came to the square in 1907. In 1897 the market was moved out to Witkowski Square (which no longer exists), and the square was paved in cobblestones. The interwar period brought no significant changes. World War II During the Siege of Warsaw in 1939, bombs and missiles fell on the square and the surrounding area. Some houses were destroyed and had to be demolished in 1940. In November, 1940, Grzybowski Square was part of the Warsaw Ghetto, and a wall separated the area from the non-Jewish side. In March, 1941, the area of the ghetto was reduced by setting its border along the eastern side of the square. After the liquidation of the ghetto, in August, 1942, the