Ukraine is a country in Eastern Europe. It has an area of, making it the largest country entirely within Europe. Ukraine borders Russia to the east and northeast, Belarus to the northwest, Poland, Slovakia and Hungary to the west, Romania and Moldova to the southwest, and the Black Sea and Sea of Azov to the south and southeast, respectively. The territory of modern Ukraine has been inhabited by humans since 32,000 BC. During the Middle Ages, the area was a key center of East Slavic culture, with the powerful state of Kievan Rus’ forming the basis of Ukrainian identity. Following its fragmentation in the 13th century, the territory was contested, ruled and divided by a variety of powers, including Lithuania, Poland, the Ottoman Empire, Austro-Hungary, and Russia. A Cossack republic emerged and prospered during the 17th and 18th centuries, but Ukraine’s territories remained divided until they were consolidated into a Soviet republic in the 20th century. It became independent in 1991. Ukraine has long been a global breadbasket because of its extensive, fertile farmlands, and it remains one of the world’s largest grain exporters. The country’s diversified economy includes a well-developed manufacturing sector, particularly in aerospace and industrial equipment, and a nascent tourism sector. Ukraine is a unitary republic under a semi-presidential system with separate powers: legislative, executive, and judicial branches. Its capital and largest city is Kiev. Since the dissolution of the Soviet Union, Ukraine continues to maintain the second-largest military in Europe, after that of Russia, when reserves and paramilitary personnel are taken into account. The country is home to 45.4 million people (including Crimea), 77.8% of whom are Ukrainians by ethnicity, and with a sizable minority of Russians (17%), as well as Romanians/Moldovans, Belarusians, Crimean Tatars, and Hungarians. Ukrainian is the official language of Ukraine; its alphabet is Cyrillic. The dominant religion in the country is Eastern Orthodoxy, which has strongly influenced Ukrainian architecture, literature and music.