Al-Dakhlah Mosque in Al-Majmaah, north of Riyadh, is one of the oldest historic mosques and believed to have been built between 850 AH and 900 AH. The Mosque is currently open for worshippers after it has been renovated as part of Mohammed bin Salman Project for Historical Mosques Renovation in the Kingdom, under which 30 mosques in 10 regions will be restored and rehabilitated. The historic Mosque is situated to the east of the old town of Dakhla in the vicinity of the old Al-Hukm Palace, about 175 km northwest of Riyadh. It is featured by its construction in the Najdi style consisting of bricks, stone, and a roof built of Tamarix and palm fronds. Its importance is considered as one of the oldest mosques in the region where citizens used to perform the Friday prayer even after they left the town in pursuance of modernity. The mosque underwent an incomplete rehabilitation operation initiated by the locals in 1432AH. The mosque is built on an area of around 666 square meters and used to accommodate about (340) worshipers. It consisted of an open semi-rectangular-shaped courtyard located in the middle of the mosque at an area of about 190 square meters and was surrounded by four corridors, qibla , northern, eastern , and southern porticos. The mosque also included a retreat located west of the Qibla portico, and a one-room school. It had three entrances distributed on the outer sides of the mosque, in addition to a rectangular minaret with a height of about 2.65 m located northwest of the mosque. After the rehabilitation process, the mosque is composed of the courtyard, the qibla hallway, Al-Sarha, the southern, eastern, and northern porticos, the vestibule, a one-room school, restrooms, and ablutions places, and it accommodates (472) worshipers.