Turkey is a transcontinental nation situated mostly in Anatolia in Western Asia, with a section on the Balkans in Southeast Europe. It is bounded to the north by the Black Sea, to the northeast by Georgia, to the east by Armenia, Azerbaijan, and Iran, to the southeast by Iraq, to the south by Syria and the Mediterranean Sea, to the west by Greece and Bulgaria, and to the northwest by Greece and Bulgaria. Cyprus is situated off the coast of Greece. Turks constitute the great bulk of the population, with Kurds being the biggest minority. Turkey's capital is Ankara, while its main city and financial center is Istanbul.
Present-day Turkey was one of the world's first permanently established places, and was home to notable Neolithic ruins such as Göbekli Tepe, as well as ancient civilizations such as the Hattians, Anatolian peoples, Mycenaean Greeks, and others. Following Alexander the Great's conquests, which began the Hellenistic period, most of current Turkey's ancient territories were culturally Hellenised, which lasted until the Byzantine era. The Sultanate of Rum controlled Anatolia until the Mongol invasion in 1243, when it collapsed into minor Turkish states. The Ottomans consolidated the princes and conquered the Balkans beginning in the late 13th century, while Turkification of Anatolia expanded throughout the Ottoman era. Ottoman expansion resumed under Selim I after Mehmed II seized Constantinople (Istanbul) in 1453. During Suleiman the Magnificent's reign, the Ottoman Empire rose to worldwide prominence. The empire's strength began to dwindle in the late 18th century, with a steady loss of lands. In the early nineteenth century, Mahmud II initiated an era of modernization. The Young Turk Revolution of 1908 limited the Sultan's power and, after a 30-year hiatus, established the Ottoman Parliament, bringing the empire into a multi-party era. The Three Pashas took control of the nation after the 1913 coup, which permitted the Empire's entrance into World War I as part of the Central Powers in 1914. The Ottoman government perpetrated genocide against its Armenian, Greek, and Assyrian citizens throughout the conflict. The Ottoman Empire was partitioned after its loss in the war.
The destruction of the Sultanate on 1 November 1922, the signing of the Treaty of Lausanne (which succeeded the Treaty of Sèvres) on 24 July 1923, and the declaration of the Republic on 29 October 1923 resulted from the Turkish War of Independence against the occupying Allied Powers. Turkey became a secular, unitary, and parliamentary republic as a result of reforms launched by the country's first president, Mustafa Kemal Atatürk. Turkey was a crucial player in the Korean War and joined NATO in 1952. Several military coups occurred in the nation in the later part of the twentieth century. In the 1980s, the economy was liberalized, resulting in higher economic development and political stability. In 2017, a vote replaced the parliamentary republic with a presidential system.
Turkey is a regional power and a newly industrialized nation with a geopolitical advantage. Its economy, which is classed as emergent and growth-leading, is the world's twentieth-largest by nominal GDP and the eleventh-largest by PPP. It is a founder member of the OECD, OSCE, BSEC, OIC, and G20, as well as a charter member of the United Nations, NATO, the IMF, and the World Bank. After joining the Council of Europe in 1950, Turkey became an associate member of the EEC in 1963, joined the EU Customs Union in 1995, and began accession talks with the European Union in 2005. Turkey has a rich cultural heritage created by centuries of history and the impact of the numerous peoples that have occupied its area through millennia; it boasts 19 UNESCO World Heritage Sites and is one of the world's most visited nations.