Gvozdansko Castle built
1500 CE.
Shown on the map at 45.133°, 16.216°.
Gvozdansko Castle is a castle in Gvozdansko village, between the towns of Dvor and Glina and not far from Zrin Castle, in Sisak-Moslavina County, central Croatia.
Text from the Wikipedia article Gvozdansko Castle, licensed CC BY-SA 4.0.