Located opposite the main entrance gate of the Musalla Cemetery, the masjid is dated to the 13th century. The building, which is a foundation work, takes its name from its proximity to the Halka Begüş gate of Konya Castle. The masjid has a square plan with a single dome. Built of cut stone and rubble stone, the dome of the structure is made of brick and currently the dome is covered with lead. There is a mausoleum under the floor of the masjid where Turkish triangles are used as dome transition elements.