A historical region and former kingdom of the present-day western Czech Republic. The Czechs, a Slavic people, settled in the area between the 5th and 6th centuries AD. A later principality was independent until the 15th century, when it passed to Hungary and then to the Habsburg dynasty of Austria. When Bohemia was incorporated into the newly formed state of Czechoslovakia in 1918, its capital, Prague, became the new nation's capital.