Witch prison found in 15th century Scottish church: Medieval chapel was used to hold suspects before they were killed and burnedIn the years before the Reformation, a small chapel in a church on the outskirts of Aberdeen had provided a quiet place for Catholic women to pray in peace. But within 30 years of the switch from Catholicism to the Protestant faith, St Mary's Chapel at the Kirk of St Nicholas in Aberdeen took on a far darker and sinister role.