Kappele is a quiet architectural and religious stop, useful for seeing a more layered side of Würzburg. The appeal is in the setting, the proportions, and the way local history shows up in stone, altars, chapels, and the surrounding streets.
Visit respectfully and avoid service times unless you are attending. It is best paired with a walk through the surrounding district, where the building makes more sense as part of the local fabric than as an isolated monument.