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'Austrian Silesia' (; ) was an autonomous region of the Austrian Empire. It was officially known in German as the ''Herzogtum Ober- und Niederschlesien'', or "Duchy of Upper and Lower Silesia". It is largely coterminous with modern Czech Silesia.
The First Silesian War (see War of the Austrian Succession) concluded in 1742 with the Treaty of Breslau, where Silesia was divided. The Kingdom of Prussia received most of the territory while a small part of southern Silesia was ceded to the Habsburg Monarchy, becoming the Duchy of Upper and Lower Silesia.
In 1918, the Austrian monarchy was abolished and the duchy formed part of the Sudetenland Province of German Austria along with northern Moravia. Under the Treaty of Saint Germain of 1919, Austrian Silesia was largely ceded to the newly-created state of Czechoslovakia with the exception of land east of the River Olza around Cieszyn which became part of Poland.

Contents

Geography

Cities

People

Geography

Cities

Cities with more than 5,000 peoples in 1880:

Cities	Population
Bielsko-Biała	13.060
Frýdek-Místek	5.912
Bruntál	7.595
Krnov	11.792
Cieszyn	13.004
Opava	20.563

People

Austrian Silesia in 1910 was home to 756,949 people of the following nationalities:

★ 43 % - Germans

★ 31 % - Poles

★ 26 % - Czechs