Church of Saint Simeon Stylites - Credit: Wikimedia Commons
The Church of Saint Simeon Stylites () is one of the oldest surviving church complexes, founded in the 5th century. It is located approximately northwestern of Aleppo, Syria. It was constructed on the site of the pillar of Saint Simeon Stylites, a renowned stylite monk. The church is popularly known as either Qalaat Semaan (, the 'Fortress of Simeon') or Deir Semaan (, the 'Monastery of Simeon'). Read more on Wikipedia
Source: en.wikipedia.org