 The medieval Hospital, associated with the Alms House, is one of only two such buildings in the world, the other being in Germany.The cathedral has many treasures and artworks, the most precious being two carved reliefs dating from the 12th century which are of exceptional rarity among English sculpture.Other ancient treasures include the remains of a Roman mosaic pavement, which can be viewed through a glass window, and a set of thirty-eight medieval misericords, dating from 1330, which remain beneath the seats of the choir, despite the fact that other parts of the choir stalls are largely a Victorian reconstruction.