The Wilton Chapel was originally a medieval chantry chapel where prayers were said for the dead.   Later it became the family chapel for the Earl of Wilton, from Heaton Hall.   You can see a 19th century Wilton family hatchment (a funeral monument) high up on the wall.  The chapel was totally rebuilt in 1889.   An aumbry, used for the storage of sacred vessels, carved into the first pillar, dates from the medieval period when an altar was situated in this part of the church.