The Church of St. Charles (Karlskirche) is located at Kreuzherrengasse 1. It was ordered built by Emperor Charles VI in 1713, when Vienna was devastated by the plague. The Emperor wanted to dedicate the church to his namesake patron saint, St. Charles Borromeo, who was revered as a healer for plague sufferers. The Church was designed by Johann Bernard Fischer von Erlach and was finished in 1739.