The Chandos Mausoleum is an early 18th-century English Baroque building by James Gibbs in the care of the Churches Conservation Trust.
The mausoleum is attached to the north side of the church of St Lawrence Whitchurch in the London Borough of Harrow, England.
The church and mausoleum are sited at the southeast corner of Canons Park which was an estate acquired by James Brydges, later 1st Duke of Chandos.
Brydges also rebuilt the church, which was a medieval building, to a design by John James.
One is a black sarcophagus against a white pyramid to the memory of Lady Mary Bruce, the first wife of the future 2nd Duke of Chandos, who died in 1738.