North of the Shahriyar Ark, outside the city walls, lies the Mosque of Yusuf Hamadani, built around the tomb of a 12th-century dervish. The complex has been largely rebuilt in the last 10 years and turned into an important pilgrimage site; it is not open to non-Muslims. This complex arose on the place of burial of a dervish Abu Yaqub Yusuf ibn Ayyub, born in the city of Hamadan (western Iran). Above his grave was erected a mausoleum, from which to this day almost nothing left. Partially destroyed the structure was rebuilt and reconstructed in the XIX century. Dervish grave symbolizes the vault of black marble, decorated with floral patterns and inscriptions. The mausoleum of mosque completely reconstructed. In the area increased several buildings. One of them represents the vault over the tomb of the famous Sufi, there can be seen a black marble slab, decorated with inscriptions and ornaments with floral motifs. In the western sector of the ensemble rises khanaka – room for prayers. It is bordered by high central quince. In the western corner of the mausoleum is a chapel with a central iwan. It is the main part of the complex. Today, Yusuf Hamadani mosque – an important Muslim shrine – a place of worship of believers.