History of Czech Silesia

thumb|upright=1.2|The native German-speaking regions in 1930, within the borders of the current Czech Republic, which in the [[interwar period were referred to as the Sudetenland:

historical regions of Bohemia, Moravia, and Czech Silesia

former autonomous region of the Kingdom of Bohemia and the Austrian Empire

former country

Trans-Olza (, ; , Záolší; ), also known as Trans-Olza Silesia (), is a territory in the Czech Republic which was disputed between Poland and Czechoslovakia during the Interwar Period. Its name comes from the Olza River.

Silesian duchy (1377–1849)

Silesian duchy (1269–1918)

Silesian duchy (1290–1850)