and Municipal Public Library building then housed the seat of Bydgoszcz Department and the ex-Jesuit college hosted the main school of the region. The Duchy of Warsaw ceased to exist in 1812, and Bydgoszcz was incorporated anew into the Kingdom of Prussia. Between 1830 and 1834, the Prussian authorities demolished the remains of the old town hall which was standing up in the middle of the actual square: municipal offices were moved to the tenement house at Długa street 37 (today's Ratuszowy hotel). In 1817, a royal gymnasium was opened in the premises of the former Jesuit college; the high school has been relocated in 1878 to its current place at Plac Wolności. Since 1878, the mayor of Bydgoszcz has always been inhabiting the late Jesuit college building. On an 1834 town plan, 31 individual estates were listed, 9 in the southern frontage, 5 in the western (plus the Jesuit church), 9 in the northern and 8 the eastern. In the middle of the 19th century, a new street, Jatki Street, was cut out in the north-eastern corner of the place, connecting with Grodzka Street. On 18 June 1848, following a violent storm, the Baroque steeple of the towers on the Jesuit church were destroyed. They were initially covered with cone-shaped roofs then rebuilt with Neo-Gothic features from 1880 to 1882. At the same time, the church façade was also reconstructed. In 1859, the City Council decided to erect a monument to Frederick the Great on the Market place. At the cornerstone laying ceremony on 21 October 1861, highly distinguished guests were present, among whom the King of Prussia William I and his son the prince Frederick III, both accompanied by their wives Augusta of Saxe-Weimar-Eisenach and Victoria. The monument was unveiled in January 1862, and the event was again attended by the Prussian heir to the throne, Frederick III Hohenzollern, together with his wife Victoria. On 4 October 1909 another sculpture was unveiled on the square: Children playing with goose or The Well (). This fountain with a well, realized by sculptor Karol Kowalczewski, has been funded by Alfred Kupffender, owner of the pharmacy "Under the Golden Eagle" (), located on the north-west corner of the place. In Prussian times, the Old Market Square was still the main municipal market area. Crowdy fairs were held there four times a year, and regular market every other week. Through all the