Marble Hill House is a Neo-Palladian villa, now Grade I listed, in Twickenham in the London Borough of Richmond upon Thames. It was built between 1724 and 1729 as the home of Henrietta Howard, Countess of Suffolk, who lived there until her death. The compact design soon became famous and furnished a standard model for the Georgian English villa and for plantation houses in the American colonies. Description Marble Hill House was built in 1724–1729 by Henrietta Howard, the mistress of King George II, to the designs of the architect Roger Morris (1695–1749) in collaboration with Henry Herbert, 9th Earl of Pembroke, one of the "architect earls". Pembroke, then Lord Herbert, based the design of Marble Hill to a large degree on Andrea Palladio's 1553 Villa Cornaro in Piombino Dese, Italy, and thus incorporated a cubic saloon on the first floor or piano nobile. Villa Cornaro also served as a model for plantation houses in the American colonies, examples being Drayton Hall (1738–1742) in Charleston, South Carolina, and Thomas Jefferson's initial version of Monticello (1768–1770). It was in other respects an adaptation of a more expansive design by Colen Campbell. It is set in 66 acres (2.67 km2) of parkland known as Marble Hill Park. The Great Room contains lavishly gilded decoration and five capricci paintings by Giovanni Paolo Pannini. Marble Hill House also contains a loaned collection of early Georgian furniture and paintings as well as the Chinoiserie collection of the Lazenby Bequest. It was located a few miles away from Kendal House, another Palladian property built around the same time for a royal mistress, Melusine von der Schulenburg, Duchess of Kendal who had been the long-term lover of George I. Both Alexander Pope and Jonathan Swift were regular guests at the house during the lifetime of Henrietta Howard. In the late 18th century the house was rented by the Prince Regent (the future king, George IV) for his mistress, Maria Fitzherbert, so the two could continue to meet in private. Shortly after its building the architecture of Marble Hill House became widely known from published engravings, and was widely admired for its compact plan and tightly controlled elevations. Its design was soon copied elsewhere, rarely in the 1730s and 1740s but more commonly thereafter, and provided a standard model for the English villas built throughout the Thames Valley and further afield, for example New Place, King's Nympton, Devon,