Krzyztopor Castle was built in the years 1631 – 1644 by WawrzyniecSenes in Ujazd. It was famous for being the biggest castle in Europe until the castle of Versailles was built. Krzysztof Ossolinski wanted to impress his contemporaries and so, he had the castle – a monumental complex of palaces – erected in the shape of a pentagon. The design of the castle was unique since it was modeled on a calendar. The number of windows in the castle was equal to the number of days in a year and there were as many chambers as there were weeks.