Ayatollah Jalal Al-Din Taheri Esfahani (in Persian: سید جلالالدین طاهری اصفهانی, sometimes spelled Jalaluddin Taheri or Jalaleddin Taheri in English language sources, born Isfahan) is an Iranian scholar, theologian and Islamic Philosopher. Taheri was a member of Assembly of Experts and representative of Ayatollah Khomeini in Isfahan province. In 2002, Taheri resigned after 30 years as prayer leader in Isfahan. Taheri's resignation letter complained of "generalized corruption of religious power in Iran." He is a critic of Islamic extremism and supreme leader of Iran. In 30 June 2009, Taheri wrote an open letter in which he called Mahmoud Ahmadinejad's presidency illegitimate.