The shrine of Fātimah al-Ma'sūmah (sister of Imām ˤAlī ibn-Mūsā Riđā) is located in Qom, the second most sacred city in Iran after Mashhad. Much of the shrine complex was first built by Shah Abbas I in the early 17th century. The shrine has attracted to itself dozens of seminaries and religious schools. The shrine is also depicted on the reverse of the Iranian 50 rials coin, issued since 2004. Also buried within the shrine are three daughters of ninth, Twelver Shī‘ah Imām, Muhammad at-Taqī.