Krzyżtopór - the ruins of a palace residence built between 1621 and 1644, surrounded by bastion fortifications, located in the town of Ujazd in the Świętokrzyskie Province. It was one of the largest palace buildings in Europe before the creation of Versailles. As of 2018, it has the status of a historical monument. The building is open to the public (ticketed entrance). Tours of the castle are possible during the day and on selected nights. Five tours of the castle are available.