It was built by Prince Seif Al-Din Almas Al-Hajib in the year 730 AH / 1330 AD.

 He became the deputy of the Sultan working in the service of the princes and the veil until the Sultan got angry and ordered his arrest and imprisonment and then killing him in the year 734 AH / 1334 AD, due to his misbehavior during the absence of the Sultan in the Hejaz lands for Hajj. He was buried in the tomb located in his mosque. The mosque is located outside Bab Zuweila on Helmeya Street from the side of Muhammad Ali Street, Al-Darb Al-Ahmar

The mosque has two doors, one of which is large, overlooking Helmeya Square, and the second is smaller, which opens onto Al-Mas Quarter. The courtyard of the mosque is surrounded by four iwans with handles mounted on marble columns, the largest of which is the qibla iwan. The edges of the steering wheel around the plate are decorated with stucco decoration. The mihrab is covered with marble topped with stucco decorations, as well as a wooden minbar dating back to the Ottoman era. The main façade has the main door and is surmounted by the minaret and the dome that tops the Almas tomb.