sentences:  The city was granted to Brandenburg-Prussia after the Treaty of Westphalia (1648) and the Treaty of Stettin (1653), and with all of Farther Pomerania became part of the Brandenburgian Pomerania.As part of the Kingdom of Prussia, "Cöslin" was heavily damaged by a fire in 1718, but was rebuilt in the following years.In 1764 on the Chełmska Hill, now located within the city limits, a Pole Jan Gelczewski founded a paper mill that supplied numerous city offices.