Crimean Tatars or Crimeans are a Turkic ethnic group and nation indigenous to Crimea. The formation and ethnogenesis of Crimean Tatars occurred during the 13th–17th centuries, uniting Cumans, who appeared in Crimea in the 10th century, with other peoples who had inhabited Crimea since ancient times and gradually underwent Tatarization, including Ukrainian Greeks, Italians, Ottoman Turks, Goths, Sarmatians and many others.