Ladies and gentleman, start your vacuums. Have your paintbrushes, thick and thin, at the ready. Tools out! It’s cleaning week at Dresden’s glorious Frauenkirche, a beloved house of worship and international symbol of reconciliation and resilience. “It’s just a big praying room,” says its lead architect Thomas Gottschlich, a soft-spoken man whom calling understated is, well, an understatement. Gottschlich’s duties include overseeing the iconic church’s maintenance, including the annual January spruce-up, when every inch of the interior gets a once-over. He pauses, considering the building’s place in history. “It is…