Ogrodzieniec Castle built
1400 CE.
Shown on the map at 50.453°, 19.552°.
Ogrodzieniec Castle is a ruined medieval castle in Podzamcze, near Ogrodzieniec, the south-central region of Poland called Polish Jura. Originating in the 14th century the castle was rebuilt several times in its long history. It is situated on the top of 515.5-metre-high Castle Mountain (Polish: Góra Zamkowa), the highest hill of the Kraków-Częstochowa Upland. The ruins are open to visitors and are a part of Trail of the Eagles' Nests, a hiking trail that connects a number of well known castles in the region.
Text from the Wikipedia article Ogrodzieniec Castle, licensed CC BY-SA 4.0.