Quadrangular castle

Quadrangular castle - Credit: Wikimedia Commons

The Quadrangular Mardakan Fortress or the Great Mardakan Castle ( or ) is a historical and architectural monument located in the Mardakan settlement of the Khazar district in Baku. It is included by the Ministry of Culture and Tourism of Azerbaijan (currently - the Ministry of Culture of Azerbaijan) in the list of monuments of world importance. In 2001, along with other objects of the coastal defence of the Caspian Sea, it was included in the UNESCO World Heritage Reserve List. Read more on Wikipedia

type: building
date from: 14th century

Source: en.wikipedia.org