Emir Assaf Mosque, Ottoman mosque in downtown Beirut, Lebanon.

The Emir Assaf Mosque is a square-plan mosque on Weygand Street in central Beirut, covered by five domes. Its entrance is framed by ablaq masonry, alternating light and dark stone, and its windows carry muqarnas detailing. Grey granite Roman columns support the central dome of the prayer hall.

This mosque was founded in 1597 by Emir Mansur Assaf on a site where a Byzantine church had previously stood. Its location in central Beirut made it an important place of worship for centuries.

The prayer hall uses Roman columns to support its central dome, showing how different periods of construction are layered into the space. Visitors notice how these ancient elements sit within the later Ottoman structure.

The mosque stands on Weygand Street in Beirut's central district, a short walk from Nejmeh Square. Its western ablution rooms, added in 1934, line up with the street running toward the square, so the building is easy to find from that direction. Visitors should dress modestly, remove their shoes and keep quiet in the prayer areas.

The ablution rooms were added in 1934 and align precisely with the street leading to Etoile Square. This arrangement reveals how the structure was woven into the city's urban layout over time.