220px-Abdulmecid_efendi-, the last Ottoman caliph

Mehmed the Conqueror enters the city of Constantinople.

Sultan Suleiman seems to have been the first Ottoman Sultan to be referred to as Caliph by the Ottoman sources.

The worldwide recognition of the House of Ottoman as the Caliph was most visible during the reign of Sultan Abdul Hamid II.

Sultan Selim the Grim of the Ottoman Empire. This was the man that won the title of Caliph for the House of Osman.

A depiction of the Umayyad Caliph Al-Walid in Damascus. The Umayyads were the last dynasty to rule over a unified Muslim world.

Depiction of an Abbasid Caliph

Sultan-Abd-Al-Hamid-the-second-the-last-caliph-of-the-Ottoman-era

Portrait of Mehmed Murad V, the Sultan of the Ottoman Empire by Barnebetto on Alexandre Maps Books

Mehmed V, the penultimate Ottoman Sultan and Caliph

Mehmed VI, the last Ottoman Sultan and Caliph.

Grave of Ertuğrul, Söğüt

Ertughal Ghazi Original Photo with Angin Altan the Artisit performed a TV Serial based on Ertughal Ghazi life history

Abdulmejid II, the last Caliph of the House of Osman