The shrine of a descendant of the Ahl al-Bayt, one of the holiest Shia sites in Isfahan. His genealogy is disputed (variously a son of Musa al-Kazim, a son of Ali al-Hadi, or a grandson of Ja'far al-Sadiq, with no consensus). The shrine building was completed in 919/1513 under Shah Ismail I and is registered Iranian national heritage. (Sources: Wikidata Q5860687; ArchNet site 3904.)