The 'Maqam al-Arba'een' mosque stands majestically at an elevation of 1,100 meters over the Syrian capital of Damascus, located on Mount Qasioun. To access this site, known as 'Maqam al-Arba'een' or 'Cave of Blood,' one must climb over 600 steps. This site is steeped in historical lore, as it is said to be the location of the world's first murder, where Cain killed Abel, making its religious and cultural resonance particularly notable in Islamic tradition.

Various narratives exist regarding the origin of the mosque's name, 'Maqam al-Arba'een.' Some experts suggest that it refers to the presence of forty adjacent prayer niches within the mosque, each with its own historical significance. Additionally, it is believed that this location was previously occupied by a pagan temple, which gave way to a church, and eventually the mosque was erected. During the Ottoman era, the site transformed into a 'khanqah' for Sufi dervishes, linking it to the Sufi traditions that persist at the site to this day.

Inside the Cave of Blood, multiple prayer niches can be found, one of which is attributed to the Prophet Abraham, believed to have worshipped there. The 'Maqam al-Arba'een' also features numerous rock formations, one resembling the mouth of a human, emphasizing the site's unique geological and spiritual characteristics. As such, this mosque is not just an architectural marvel but a tapestry of profound historical narratives that reflect the layered cultural history of Damascus.