Zveçan

Zveçan - Credit: Wikimedia Commons

The Fortress of Zvečan (, ; ), also known as Zvečan/Zveçan medieval fortress and Fortress of Mitrovica (), located in the northwest of the city of North Mitrovica, in Kosovo, is an enormous castle and one of the oldest fortresses in Southeastern Europe. It was built on the top of the extinct volcano vent, overlooking the Ibar river. Zvečan Fortress was declared Monument of Culture of Exceptional Importance in 1990, and it was protected by the Republic of Serbia. Read more on Wikipedia

type: military installation
date from: 11th century

Source: en.wikipedia.org