The Karlskirche (St Charles Church), says my guide book, was built between 1715 and 1737 to honor the patron saint of the fight against the plague, which by 1713 had killed more than 8,000 residents of Vienna. For a fee, we were able not only to enter the building and climb to an overlook outside, but also to take a scaffolding-elevator within the sanctuary to a scaffolding-walkway high above the sanctuary, from which perspective I photographed the ornamented window in the gallery below.