sentences:  James Wyatt (1746–1813), a fashionable and extremely prolific architect of the time, was commissioned to design a mausoleum to hold the coffins of the Earls and their family members.Wyatt exhibited the design at the Royal Academy in 1783.A slightly modified design was completed in 1786 under the supervision of George Dance the Younger (1741–1825), as Wyatt had a poor reputation for supervising the execution of his work.