Connect with your spiritual side and mingle with worshippers at St. Peters Church. Explore outside for a while or ask if you are allowed to join the next service.
You'll have no end of sightseeing choices when visiting Kunstenkwartier. St. Peter's Church is a good place to kick off here, but there are loads of other worthwhile spots to experience. Gravensteen Castle, Flanders Expo, and Saint Bavo Cathedral are close to the house of prayer and will fill in your day nicely.