High Quality Content by WIKIPEDIA articles! Muhammad Baqir Majlesi was a renowned and very powerful Iranian Twelver Shi'a cleric, during the Safavid era. He has been described as "one of the most powerful and influential Shi'a ulema of all time," whose "policies and actions reoriented Twelver Shia'ism in the direction that it was to develop from his day on." He is buried next to his father in a family mauseleum located in the Jamé Mosque of Isfahan