In 17th century Moravia, today's oldest theatre building in Central Europe was founded – Reduta Theatre. 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, defenders of Olomouc 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 raised to archbishopric. In 1782, the Margaviate of Moravia was merged with the Austrian Silesia into the "Moravia-Silesia," with Brno as its capital city. This lasted until 1850.