The reason for building two chancels is not entirely clear. This structure had two chancels (dedicated to St Mary and St Peter). These buildings had long naves and small rectangular chancels; porticus sometimes surrounded the naves. The nave and chancels have barrel roofs. The aisles and chancels are also crenellated. The chancel is square-ended, like the chancels of Lincoln, York and several other English cathedrals. Chancels were suppressed, screens were deemed unnecessary obstructions. Furness's windows were often rounded and did not use pointed chancels. He built new chancels at St. Thomas's, Winchelsea, Sussex; and All Saints', Hastings.