Deir al-Qamar is a city south-east of Beirut in south-central Lebanon. It is located five kilometres outside of Beiteddine in the Chouf District of the Mount Lebanon Governorate at 800 m of average altitude.

Beit ed-Dine, also known as Btaddine is a small town and the administrative capital of the Chouf District in the Mount Lebanon Governorate in Lebanon. The town is located 45 kilometers southeast of Beirut, and near the town of Deir el-Qamar from which it is separated by a steep valley. It had 1,613 registered voters in 2010 and its inhabitants are predominantly Christians from the Maronite, Melkite and Greek Orthodox denominations. Beit ed-Dine's total land area consists of 244 hectares and its average elevation is 860 meters above sea level.