sentences:  The mausoleum is built of brick faced with Portland stone, is square with projecting chamfered corners, and surmounted by a pyramid.The form is an unusually grand classical temple, using Roman Doric order, fluted columns in antis on the face, prostyle on the angles.The mausoleum is a high point of the neo-classical period in Britain, which was much more concerned than the preceding baroque period that classical architecture should be used correctly according to ancient Greek and Roman precedent.