Shaykh Ahmad-i-Ahsa'i started a Shi'a Islam religious group in Persia in the 1790s. The member of the group, who were called Shaykhis, believes that god was sending a new messenger to earth very soon. They called the new messenger the Qá'im, or theMahdi. When Shaykh Ahmad died, Siyyid Kázim, who was from Rasht, Iran, became the new leader of the Shaykhis. Shaykh Ahmad lived was born in 1753 and he died in 1862. Siyyid Kázim was born in 1793 and he died in 1843.