Old Museum Block At Charterhouse School

The Old Museum Block at Charterhouse School, dated 1890, was originally used as a museum, carpentry workshop, lecture theatre, and classrooms, and is now utilized as classrooms and a lecture theatre. The building is constructed of Bargate rubblestone with ashlar dressings and features a Welsh slate roof. It has one and two storeys. At the west end, there are two parallel ranges with gable ends (the former museum), which are fronted by a single-storey, eight-bay arcade. This arcade is flanked by a one-storey, two-bay block at either end, with a slightly taller theatre located to the rear (east).

Designed in a modified Gothic style, the building includes plinths, quoins, offset buttresses, and two-centred-arched, quoined openings. It also features roll-mounted strings, raised verges with coping, and multifaced finials. The west front showcases an arcade with gabled buttresses and a parapet that is interrupted by two recessed panels displaying mottoes and gableted, roll-moulded coping. Inside the arcade, there is a board door or small-paned window in each bay. Above the arcade, the paired gables of the parallel ranges each contain a large, transomed, four-light window with triangular-headed lights and leaded glazing. Between the gables is a gableted plaque featuring a coat of arms and the date.

The single-storey blocks at each end of the arcade have square-headed, three-light windows. The rear of the building features the lecture theatre, which has a gable with polygonal corner stair towers that include board doors. The ground floor is masked by a pent-roofed infill addition, while the first floor has windows of three lights flanked by two lights. The returns of the former museum include full-length dormer windows with continuous small-paned glazing lights that have round-arched tops. The lecture theatre on the north side features three three-light windows on the first floor. Attached buildings to the south are not of special interest.