Ukraine (Україна,Украи́на) is a country in Central and Eastern Europe. It is the second largest contiguous country on the European continent. Ukraine is a unitary state composed of 24 oblasts (provinces), one autonomous republic (Crimea), and two cities with special status: Kiev, its capital and largest city, and Sevastopol, which houses the Russian Black Sea Fleet under a leasing agreement. Ukraine is a republic under a semi-presidential system with separate legislative, executive, and judicial branches. Since the dissolution of the Soviet Union, Ukraine continues to maintain the second largest military in Europe, after that of Russia. The country is home to 46 million people, 77.8 percent of whom are ethnic Ukrainians, with sizable minorities of Russians (17%), Belarusians and Romanians. The Ukrainian language is the official language in Ukraine. Russian is also widely spoken. The dominant religion in the country is Eastern Orthodox Christianity, which has heavily influenced Ukrainian architecture, literature and music.