Mausoleum Approximately 10 Metres North West of North Aisle of Church of St Mary the Virgin

The mausoleum, located approximately 10 metres northwest of the north aisle of the Church of St Mary the Virgin in Maulden, is a Grade II listed structure. It contains the remains of the Bruce family and was rebuilt in 1859, likely by Benjamin Ferrey, from a structure originally erected in 1656 by Thomas Bruce, the 1st Earl of Elgin. The mausoleum stands on a vaulted crypt, which is believed to be of medieval origin. It is constructed of coursed ironstone with ashlar dressings and features a hipped clay tile roof adorned with bands of fishscale tiles.

This small, single-storey building has an elongated octagonal plan and diagonal buttresses at each angle. The moulded parapet includes a somewhat worn frieze. Both the west and east elevations have small circular quatrefoiled windows, while the south elevation features a pointed-arched doorway topped by a carved stone crest.

Inside, the north elevation houses a monument to Diana, Countess of Elgin, erected in 1656 and thought to be by Thomas Burman. This monument consists of an architectural marble sarcophagus with gadrooning in the middle and a surmounting basin. The carved cartouche at the front and the half-figure of Lady Elgin, who was dressed in a shroud and pointing heavenwards, have been removed. Round-arched niches on the west and east sides once held marble busts of Thomas Bruce, the 1st Earl of Elgin, who died in 1663, and his grandson, who also died in 1663, both attributed to John Bushnell. The crypt contains a plain late 12th-century font.