General Post Office Museum

The General Post Office Museum is a former house, now a museum, dating from the 15th century. The building features a ground floor made of brick and flint rubble, with a timber frame and brick infill on the first floor, topped by a pantile roof. It is set back and runs parallel to the street line, standing two storeys tall with a jettied first floor. The structure represents one bay of what was originally a five-bay house.

Notable architectural features include a carriage entry with arched braces, which have pierced, carved spandrels supported by carved stone corbels. The west gable displays corbelled brickwork at the jetty level, with a squared-flint pattern above. On the first floor, there is a four-light frieze window with shallow mouldings on the mullions. Inside, there is one truss and the remains of a crown-post roof, which has a moulded base and capital on the crown-post.

Additionally, there is a contemporary brick-built undercroft with a pointed barrel-vault profile, aligned parallel to the street line. A painting by H. Ninham from 1848 depicts the complete building. The museum is graded II* due to the significance of the undercroft, which is part of an important group within the City Walls, and it is scheduled as an Ancient Monument.