Alī ibn Abī Ṭālib

Alī ibn Abī Ṭālib was a cousin, son-in-law and companion of the Islamic prophet Muhammad. He ruled as the fourth Rashidun caliph from 656 until his assassination in 661. He is considered one of the central figures in Shia Islam, the first Shia Imam and, in Sunni Islam, as the fourth of the "rightly guided" (rāshidūn) caliphs.