Question: why is najaf important to islam?
Answer: Al-Najaf is considered sacred by Shi'a Muslims. An-Najaf is renowned as the site of the burial place of Muhammad's son in law and cousin, Imam 'Alī ibn Abī Tālib. The city is now a center of pilgrimage throughout the Shi'ite Islamic world. It is estimated that only Mecca and Medina receive more Muslim pilgrims.