Tabriz, SAEDNEWS, Oct. 15: Having ensured his global and enduring legacy by establishing one of the world's great religions, Islam, Muhammad died on 28 Safar of 11 A.H. Though the cause of his death wasn't recorded, it is generally assumed it was due to a fever. The Prophet was buried where he died in Aisha's house. During the reign of subsequent caliphs, the area of the burial was expanded to become the Mosque of the Prophet with the dome above the tomb added in the 13th century and the complex being a burial site for other notable figures of early Islam. When Medina was conquered by the Wahhabis in 1806, the tomb was stripped of its gold and ornaments, though it narrowly avoided being destroyed, a fate that happened to many Islamic burial sites in the region for religious reasons. Imam Hassan was a grandson of the Muhammad, the eldest son of Ali and Muhammad's daughter Fatimah, and was the older brother of Husayn. Among Shia Muslims, Hasan is revered as the second Imam. It is believed that Hussan was poisoned by his wife in Medina, Saudi Arabia on the orders of the Caliph Muawiya, who wanted to ensure the succession of his son.