The oldest surviving theatre building in Central Europe, the Reduta Theatre, was established in 17th-century Moravia. Ottoman Turks and Tatars invaded the region in 1663, taking 12,000 captives. In 1740, Moravia was invaded by Prussian forces under Frederick the Great, and Olomouc was forced to surrender on 27 December 1741. A few months later the Prussians were repelled, mainly because of their unsuccessful siege of Brno in 1742. In 1758, Olomouc was besieged by Prussians again, but this time its defenders forced the Prussians to withdraw following the Battle of Domstadtl. In 1777, a new Moravian bishopric was established in Brno, and the Olomouc bishopric was elevated to an archbishopric. In 1782, the Margraviate of Moravia was merged with Austrian Silesia into "Moravia-Silesia", with Brno as its capital. This lasted until 1850. Moravia was briefly one of 17 former crown lands of the Cisleithanian part of Austria-Hungary after 1867. According to Austro-Hungarian census of 1910 the proportion of Czech in the population of Moravia at the time (2.622.000) was 71.8%, while the proportion of Germans was 27.6%.