It is bordered on the north by Shushan Abdel-Baqi Square, on the west by Ahmed Bey Palace, and on the east of Didouche Mourad Street.

It was built during the reign of Hussain Kalyan, known as Abu Kamiya (1713-1736), and it is known today as the Hassan Bey Mosque.

French researchers, including Cherbonneau, who He obtained a document from Sheikh Mustafa bin Jalul proving that his grandfather Abbas was the one who built the mosque with his money in the neighbourhood of Souk al-Ghazl.

In 1838 During the French invasion It was modified and transformed to a Catholic church under the name Notre-Dame des Sept-Douleurs, meaning The Lady of the Seven Pains,[1] In 1962 after Independence, it returned to its original nature as a mosque, and is currently known as El Bey Mosque.

The facade of doors and entrances, the mosque according to its current form, its general plan is a rectangular shape, merging in part of its northern and western facade with Ahmed Bey Palace and a ground slope.

There are 30 columns, including those built into the wall, all of them resting on circular bases with cylindrical bodies.