The Ottoman Empire (1299–1923) (Ol Ottoman Turkish: دولت عالیه عثمانیه Devlet-i Âliye-yi Osmâniyye, Late Ottoman and Modern Turkish: Osmanlı Devleti or Osmanlı İmparatorluğu), was a multi-ethnic and multi-religious Turkish-ruled state. The state was known as the Turkish Empire or Turkey by its contemporaries. (See the other names of the Ottoman State.) It was succeeded by the Republic of Turkey, which was officially proclaimed on October 29, 1923.