This work deals with the history of castles in Slavonia and the present state they are in. The castle Prandau-Norman in the twon of Valpovo, castle Eltz in the town of Vukovar and castle Pejačević in the town of Našice are included in detail. The first part of this work is about the history of Slavonia, the castles and curiae in Slavonia and castles in general. The present castle in Valpovo was built during the first half of the 18th century and its residents were the family Hilleprand of Prandau and, since 1885, the noble family Norman of Ehrenfels. Since 1956 the castle has been housing the Museum of the Area of Valpovo. The castle Eltz is a baroque castle situated in the town of Vukovar. The construction of the castle was started in 1749 by the Vukovar landowner count Anzelmo Kazimir Eltz and further work was carried on several times. The castle Eltz has been housing the Town Museum of Vukovarsince 1968. The building was badly damaged in 1991 but was completely renewed in 2011. In the center of Našice there are the small and the big castle Pejačević. Count Ladislv Pejačević started the building. Today the castle houses the Local Museum of Našice.