Custodian of the Two Holy Mosques

The Custodian of the Two Holy Mosques, or Protector of the Two Holy Cities, is a royal style that has been used officially by the monarchs of Saudi Arabia since 1986. The title has historically been used by many Muslim rulers in the past, including the Ayyubids, the Mamluks, the Ottomans and the Sharifain rulers of Hejaz. The title was sometimes regarded to denote the de facto Caliph of Islam, but it mainly refers to the ruler taking the responsibility of guarding and maintaining the two holiest mosques in Islam: Al-Haram Mosque in Mecca and the Prophet's Mosque in Medina, both of which are in the Hejazi region of Saudi Arabia. The Custodian has been named the most powerful and influential person in Islam and the Sunni branch of Islam by The Muslim 500, as well as the most powerful Muslim and Arab ruler in the world.