Nāṣer al-Dīn Shāh, also spelled Nāṣir al-Dīn Shāh, (born July 17, 1831, near Tabrīz, Iran—died May 1, 1896, Tehrān), Qājār shah of Iran (1848–96) who began his reign as a reformer but became increasingly conservative, failing to understand the accelerating need for change or for a response to the pressures brought by contact with the Western nations.Although a younger son of Moḥammad Shāh, Nāṣer al-Dīn was named heir apparent through the influence of his mother.