The house was built by Sir John Thynne and was designed mainly by Robert Smythson, after Longleat Priory was destroyed by fire in 1567. It took 12 years to complete and is widely regarded as one of the finest examples of Elizabethan architecture in Britain. It continues to be the seat of the Thynn family, who have held the title of Marquess of Bath since 1789; the present Marquess, Ceawlin Thynn, took over management of the business from his father Alexander in 2010.