You don't have to be of strong faith to appreciate the tranquil atmosphere of St. Nikolaos Cathedral. Ask when the next mass is scheduled or when it's open for general viewing.
St. Nikolaos Cathedral is an interesting place to begin exploring Kuopio. This principal church comes recommended by fellow travelers, but it's not the only spot to see here. Set aside time for other sights like University of Eastern Finland, Puijo Tower, and Matkus Shopping Center to really experience what's on offer in the area.