The Church of Saint Simeon Stylites (Arabic: كنيسة مار سمعان العمودي‎ Kanīsat Mār Simʿān al-ʿAmūdī) is a historical building located about 30 km (19 mi) northwest of Aleppo, Syria. It is the oldest surviving Byzantine church, dating back to the 5th century. Built on the site of the pillar of St.