Franz Liszt, Eugène Delacroix, and Adam Mickiewicz. In fact, Chopin's "La Polonaise" was composed expressly for the Polish ball held there every year. 20th and 21st centuries The Hôtel Lambert was discreetly split into several luxurious apartments. It was once the home of actress Michèle Morgan, Mona von Bismarck, and of Alexis von Rosenberg, Baron de Redé, who rented the ground floor from 1947 until his death. De Redé entertained his lover Arturo Lopez-Willshaw (1900–1962), who continued to maintain a formal residence with wife Patricia in Neuilly. Redé and Lopez-Willshaw's dinner parties and balls were at the center of le tout Paris. In 1969 de Redé staged his most famous ball, the Bal Oriental, with guests such as Jacqueline de Ribes, Guy de Rothschild, Salvador Dalí, Brigitte Bardot, Dolores Guinness, and Margrethe II of Denmark. In 1975, the Czartoryski heirs sold the Hôtel Lambert to Baron Guy de Rothschild, whose wife, Marie-Hélène de Rothschild, was a close friend of de Redé; they used it as their Paris residence. In September 2007, the Hôtel Lambert was sold by the Rothschilds to Prince Abdullah bin Khalifa al-Thani, brother of the Emir of Qatar for the purported sum of 80 million euros ($111 million). A UNESCO World Heritage-listed building, it was in need of restoration, as parts of its wooden structure were rotting, staircases were sagging, and paint was cracked and discoloured. The Prince's plan for a comprehensive overhaul of the building sparked controversy and became the subject of legal action brought by French conservationists. The scheme included plans to install air-conditioning, elevators, an underground car park with an exit through the notable curved garden wall, and a number of security measures. This involved digging under the garden and raising the 17th-century garden wall 80 cm. One heritage architect claimed the plans had "the aesthetics of a James Bond villa". Former tenant Michèle Morgan suggested that super-rich clients wanting a tailor-made luxury modern residence should consider a larger site on the outskirts of Paris rather than a cramped position limited on all sides by the river Seine and listed monuments. However, Alain-Charles Perrot, the architect in charge of the project, suggested that there was an element of racism in the objections. After several years of wrangling, a truce was overseen by the Ministry of Culture and Paris City Hall, and the renovation was given the go-ahead under the supervision of Bâtiments de France,