Currently enjoying restoration, Marlborough House on the Old Steine was built by Robert Adam in 1765 and purchased shortly afterwards by the fourth duke. By 1780, development of the Georgian terraces that characterise the classic Brighton streetscape had started, and the town quickly became the fashionable resort of Brighton. The growth of the town was further encouraged when, in 1786, the young Prince of Wales, later the Prince Regent and George IV, rented a farmhouse to make a public demonstration of his new-found fiscal sobriety. He spent much of his leisure time in the town, where he set up a discreet establishment for his mistress Mrs Fitzherbert and constructed the exotic Royal Pavilion, which is the town's best-known landmark.