Žrnov Fortress

Žrnov Fortress - Credit: Wikimedia Commons

Žrnov () or Žrnovan (Жрнован) was a medieval fortress on the highest top of the Avala Mountain, at , in Belgrade, Serbia. The Ancient Romans had built an outpost there, and later the Serbs expanded it into a fortress. It was completely demolished in 1934 to make the way for the Monument to the Unknown Hero. Read more on Wikipedia

type: military installation
date from: {{small|[[Roman Serbia|Roman Era]]}}

Source: en.wikipedia.org