Turkey is a transcontinental country located in both Western Asia and Southeastern Europe. It has a population of over 76 million people and has been inhabited since paleolithic times, including by various ancient Anatolian civilizations. In the early 20th century, the Ottoman Empire collapsed and the modern Republic of Turkey was established in 1923 under the leadership of Mustafa Kemal Atatürk. Turkey has a predominantly Turkish population and Istanbul is its largest city and economic center, while Ankara is its capital. Tourism is a major industry focused on historical sites and seaside resorts.