Dorchester Abbey in Oxfordshire was formerly an Augustinian Abbey. In the monastic chancel, which dates from the second quarter of the fourteenth century is a glorious sedilia and piscina. They are unusual in that they have their own glazing, the sedilia pierced with three and the piscina with a single tiny window. The sedilia windows are filled with glazing depicting seated bishops, but the sedilia has this interesting panel. It is a scene from a High Mass, a solemn celebration of the Eucharist. A seated priest, holding a missal, is assisted by a deacon and subdeacon who offer him the eucharistic oblations, a host on a paten and wine and water cruets.
The sedilia is no longer used by the Anglican establishment at Dorchester, but it was used by the Roman Catholics at a recent requiem mass. Photo by Lawrence OP.