St Mary's Chantry, Alnwick. Photo Northumberland County Council, 1971.

In July 1448 permission was given to build a chantry and chantry house in Alnwick. A chantry is a small chapel where priests prayed for the dead. It was built in the Church of St Michael. The Chantry House, where the priests lives, was built in Pottergate. It was also used as a school, and was the origin of Alnwick Grammar School. The building became ruined by the 18th century. These ruins can still be seen. The building is 18m by 6m, and has walls nearly a metre thick. The north wall is now part of a garden wall. This is Grade II* Listed Building protected by law.