 It lies approximately south-east of Nowa Sól and south-east of Zielona Góra.The castle of "Sedlischo" was first mentioned in a 1298 deed, when the Silesian duke Henry III of Głogów acquired it from the castellans at Bytom Odrzański.After the Duchy of Głogów had become a Bohemian fief in 1331, it was seized by the royal House of Luxembourg, who enfeoffed several noble families with Siedlisko.