Forty Martyrs Armenian Cathedral is an Armenian Apostolic church located in Al-Jdayde quarter of Aleppo, Syria. It was built and completed in 1491 AD and later renovated in 1912 AD. The bell tower, which was erected in 1912 AD, is considered to be one of the unique samples of the baroque architecture in Aleppo. The cathedral was inscribed as a UNESCO World Heritage Site in 1986 as part of the ancient city of Aleppo.