Palmyra Castle, also known as Fakhr-al-Din al-Ma'ani Castle (Arabic: قلعة فخر الدين المعني) or Tadmur Castle, is a castle overlooking Palmyra in the province of Homs, Syria. The castle is thought to have been built by the Mamluks in the 13th century on a high hill overlooking the historic site of Palmyra, and is named for the Druze emir Fakhr-al-Din II, who extended the Druze domains to the region of Palmyra during the 16th century. The historic site was placed on the list of World Heritage Sites in Danger in 2013 due to the ongoing Syrian Civil War.