Āqā Buzurg Tihrānī, Muḥammad Muḥsin b. ʿAlī b. Muḥammad Riḍā b. Muḥsin b. ʿAlī Akbar (11 Rabīʿ I 1293–13 Dhū al-Ḥijja 1389/7 April 1876–20 February 1970), was a Twelver Shiʿi jurist and bibliographer. He was born in Tehran, and his father and grand-father were theologians in the city. His great-grandfather, Ḥājj Muḥsin, was a merchant who founded the first printing-house in Iran with the help of Manūchihr Khān Muʿtamid al-Dawla Gurjī (Āqā Buzurg, 15/128; Munzawī, ‘al-Dharīʿa’, 247).

Āqā Buzurg began his primary education at the Dāngī madrasa, and c…