The Deir el Qamar Synagogue (Arabic: كنيس دير القمر) is a former Orthodox Jewish congregation and synagogue, located in Deir el Qamar, a village in south-central Lebanon. Completed in the 17th century during the Ottoman era, the synagogue is the oldest synagogue in Mount Lebanon. The synagogue served the local Jewish population, some of whom were part of the immediate entourage of Fakhr al-Din II.
