 Complete the following phrase:  To the south of the Bara Gumbad is Bahram Khans three-domed structure, commissioned in 1744, which serves as the primary mosque of the compound. Each of its domes has tall finials and rest on crenelated drums. Like the Bara Gumbad, its eastern side has three arched doors, the middle also larger, as well as a modern veranda. The mosque was damaged during the 