Grand Ayatollah Sheikh Mohammed Mohsen Razi (Arabic: محمد محسن بن علي بن محمد رضا الطهراني النجفي), popularly known as Agha (Aqa) Bozorg Tehrani (Persian: آقا بزرگ تهرانی) (11 Rabi-I 1293 – 13 Zul-Hijjah 1389 AH /7 April 1876 – 20 February 1970), was born in Tehran. He was a Shia marja from Hawza Elmiye Najaf. He was the teacher of Grand Ayatollah Ali Hussaini Sistani, Grand Ayatollah Muhammad Hussain Najafi, and many others. He wrote, among others, the following notable books: Al-Dharīʿa ilā Taṣānīf al-Shīʿa (List of Shia Books) (26 volumes), the list was compiled in 1908 Ṭabaqāt aʿlām al-Shīʿa (List of Shia Ulema) (9 volumes) Mosannafet-e Shi`e (6 volumes) Mustadrak kashf al-ẓunūn or Dhayl kashf al-zunūn, Tehran, Maktabat al-Islāmiyya and also Ja'fari Tabrizi, 1387/1967. Source: Wikipedia (en)