Church of Saint Simeon Stylites built
401 CE.
Shown on the map at 36.334°, 36.844°.
The Church of Saint Simeon Stylites (Arabic: كنيسة مار سمعان العمودي, romanized: Kanīsat Mār Simʿān el-ʿAmūdī) is one of the oldest surviving church complexes, founded in the 5th century. It is located approximately 30 kilometres (19 mi) 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 (قلعة سمعان, Qalʿat Simʿān, the "Fortress of Simeon") or Deir Semaan (دير سمعان, Dayr Simʿān, the "Monastery of Simeon"). Completed in 490, it was not surpassed as a Christian church until the construction of Hagia Sophia was finished in 537.
Text from the Wikipedia article Church of Saint Simeon Stylites, licensed CC BY-SA 4.0.