Shah Abbas Mosque, mosque in Keshla, Baku, Azerbaijan

Shah Abbas Mosque is a 17th-century mosque in the Keshla settlement of Baku's Nizami district. Its square plan, 12 metres on each side, follows the Shirvan-Absheron school: a central hall under a round dome, four large arches, and small arched-ceiling rooms at the corners. The walls taper inward from the base at 60 degrees, and an Arabic stone inscription sits above the simple portal.

The mosque in Keshla is a 17th-century monument built by order of the Safavid shah Abbas I. It follows the Shirvan-Absheron school plan, close to the Tuba Shakhi mosque in Mardakan (1481). After the Soviet occupation of 1920 it was closed and only resumed activity in 1989.

The mosque is known locally as Keshla Mosque, and its Arabic stone inscription above the entrance portal is the only epigraphic text recorded in the sources. The prayer hall's dome has a twelve-sided base, a form read as a reference to the Twelve Imams of Shia Islam.

The mosque stands in the Keshla settlement of Baku's Nizami district, in the north-eastern part of the city. It is an active place of worship, so visitors should dress modestly and avoid entering during prayers; the building reopened for worship in 1989 after decades of closure.

The dome's lower section has twelve corners, a detail read as a reference to the Twelve Imams of Shia Islam. The mihrab and minbar are carved from massive hewn stone, and the windows are built in two layers, wood first and then pierced stone.