The Ottoman Caliphate is abolished, when the Caliph Abdülmecid II of the Ottoman dynasty is deposed. The last remnant of the old monarchy gives way to the reformed Turkey of Kemal Atatürk.

The Ottoman Caliphate was the claim of the heads of the Turkish Ottoman dynasty, rulers of the Ottoman Empire, to be the caliphs of Islam during the late medieval and early modern era.

A caliph is the supreme religious and political leader of an Islamic state known as the caliphate. Caliphs led the Muslim Ummah as political successors to the Islamic prophet Muhammad, and widely recognised caliphates have existed in various forms for most of Islamic history.

Abdülmecid II or Abdulmejid II, commonly known as Abdülmecid Efendi, was the last Ottoman caliph, the only caliph of the Republic of Turkey, and head of the Osmanoğlu family from 1926 to 1944. Unlike previous caliphs, he used the title Halîfe-i Müslimîn, instead of Emîrü'l-Mü'minîn.

The Ottoman dynasty consisted of the members of the imperial House of Osman, also known as the Ottomans. According to Ottoman tradition, the family originated from the Kayı tribe branch of the Oghuz Turks, under the leadership of Osman I in northwestern Anatolia in the district of Bilecik, Söğüt. The Ottoman dynasty, named after Osman I, ruled the Ottoman Empire from c. 1299 to 1922.

Turkey, officially the Republic of Türkiye, is a country mainly located in Anatolia in West Asia, with a relatively small part called East Thrace in Southeast Europe. It borders the Black Sea to the north; Georgia, Armenia, Azerbaijan, and Iran to the east; Iraq, Syria, and the Mediterranean Sea to the south; and the Aegean Sea, Greece, and Bulgaria to the west. Turkey is home to over 85 million people; most are ethnic Turks, while ethnic Kurds are the largest ethnic minority. Officially a secular state, Turkey has a Muslim-majority population. Ankara is Turkey's capital and second-largest city. Istanbul is its largest city and economic center. Other major cities include İzmir, Bursa, and Antalya.