Wadi Al-Salaam (Valley of Peace) is an Islamic cemetery, located in Shia holy city of Najaf, Iraq. It is reputed to be the largest cemetery in the world. It is estimated more than half a million corpses are interred in the cemetery each year. The cemetery covers 1485.5 acres (6 km²) and contains millions of bodies. The cemetery holds the graves of many Muslims, and is located near the Shrine of Imam Ali ibn Abi Talib, the first Shia Imam and fourth Sunni Caliph. Thus, nearly all Shi'as in Iraq request that they be buried in this cemetery.