Ostrovica Fortress

Ostrovica Fortress - Credit: Wikimedia Commons

Ostrovica Fortress (; ) is a ruined medieval fortification on a solid rock jutting from the top of the hill above the village of Ostrovica in Zadar County, Croatia. It is located between the two historical and geographical regions, Bukovica and Ravni Kotari. It was once an important stronghold, known as the "Key to the City of Zadar", as it was a key defense of the city. It was destroyed during the Ottoman–Venetian Wars in the second half of the 17th century, leaving only a few remains. Read more on Wikipedia

type: military installation
date from: 12th century (?)

Source: en.wikipedia.org