 Complete the following phrase:  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 