Abolition of the Ottoman sultanate: The last sultan of the Ottoman Empire, Mehmed VI, abdicates.

The abolition of the Ottoman sultanate by the Grand National Assembly of Turkey on 1 November 1922 ended the Ottoman Empire, which had lasted from c. 1299. On 11 November 1922, at the Conference of Lausanne, the sovereignty of the Grand National Assembly exercised by the Government in Angora over Turkey was recognized. The last sultan, Mehmed VI, departed the Ottoman capital, Constantinople, on 17 November 1922 aboard HMS Malaya. The legal position was solidified with the signing of the Treaty of Lausanne on 24 July 1923 and the proclamation of the Republic of Turkey on 29 October 1923. In March 1924 the Caliphate was abolished, marking the end of the last remnant of the former monarchy.

The Ottoman Empire, also called the Turkish Empire, was an imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Central Europe, between the early 16th and early 18th centuries.

Mehmed VI Vahideddin, also known as Şahbaba among the Osmanoğlu family, was the last sultan of the Ottoman Empire and the penultimate Ottoman caliph, reigning from 4 July 1918 until 1 November 1922, when the Ottoman sultanate was abolished and replaced by the Republic of Turkey on 29 October 1923.