Buckingham Palace forms the architectural core of the palace was built for the first Duke of Buckingham and Normanby in 1703 to the design of William Winde. The style chosen was of a large, three-floored central block with two smaller flanking service wings. Buckingham House was eventually sold by Buckingham's natural son, Sir Charles Sheffield, in 1761 to George III for £21,000. Sheffield's leasehold on the mulberry garden site, the freehold of which was still owned by the royal family, was due to expire in 1774. Under the new Crown ownership, the building was originally intended as a private retreat for King
Copper-Roof Palace II Rákóczi, it was completely remodeled in 1698-1701 for Jerzy Dominik Lubomirski. Lubomirski expanded the palace by building a southern wing, perpendicular to the rest of structure, and also expanded the western elevation. Shortly after its construction the palace became known as "Palais Martin", after Lubomirski's grandson. In 1720 the palace was rebuilt with an addition of a second northern wing. Additionally the interior was decorated with rococo paintings. After 1777 the palace passed into ownership of Poland's last king, Stanisław August Poniatowski, who hired the architect Domenico Merlini to once again redesign the inside rooms of the palace and