The Austrian capital city of Vienna is known in part for its Baroque architecture. It's no surprise then that in this Catholic country, some of the most prominent Baroque style buildings in the city are churches. In this drone video by contributor W. Obreder, you'll get a bird's eye view of the most famous of these churches. Rektoratskirche (St. Charles Church) was commissioned in 1713 by the Holy Roman Emperor Charles VI. It was completed over two decades later, in 1737.