Breslau (region)

It comprised the eastern parts of the historic Lower Silesia region and the former County of Kladsko, both of which were conquered by Prussia in the First Silesian War in 1742.

Silesia had been part of Bohemian crown lands of the Habsburg monarchy until most of it was ceded to the Kingdom of Prussia in the First Silesian War, codified by the 1742 Treaty of Breslau.

In 1813, the administrative Regierungsbezirk was established in Prussian Silesia, with its capital in Breslau (present-day Wrocław).

After the short-lived Regierungsbezirk Reichenbach (Dzierżoniów) was dissolved in 1820, the Middle Silesian district also comprised Glatzer Land (Kłodzko Land) in the south and several districts of the former duchies of Münsterberg (Ziębice), Jauer (Jawor) and Brieg (Brzeg).

After World War I, the state of Czechoslovakia arose on the southern border, while Greater Poland in the north became part of the Second Polish Republic.