You don't have to be religious to enjoy the serene atmosphere of Konigsberg Cathedral. Find out when the next mass starts or when you can go for a wander through.
This Kaliningrad principal church is a good spot to kick off your day of sightseeing. There's lots to do and see nearby, including Immanuel Kant's Grave, Amber Museum, and Kaliningrad Zoo. Take your time at Konigsberg Cathedral before making tracks to these other fine sights.