أحمد بن زين الدين الأحسائي
In the 1790s in Persia, Shaykh Ahmad (1753–1826) began a religious movement within Twelver Shia Islam. His followers, who became known as Shaykhis, were expecting the imminent appearance of the "al-Qa'im" of the Ahl al-Bayt, also called "the Mahdi". After Shaykh Ahmad's death, leadership passed to Kazim Rashti (1793–1843).