The shrine of Sayyid Hamza, regarded as a son of the seventh Imam Musa al-Kazim (an Ahl al-Bayt sayyid). Though his lineage carries a minor dispute, he is accepted as a sayyid of an Imam's line. His death year is not reliably documented. In the Sheshgelan district of Tabriz, the shrine — famous for its mirror-work — is an active mosque and pilgrimage site. (Sources: Wikidata Q6003204; English Wikipedia.)