which safeguards historic monuments. Work began in 2010. On 10 July 2013 a portion of the building was severely damaged by a fire which started in the roof during renovation work. The Cabinet des Bains with a series of ceiling frescoes by Eustache Le Sueur was completely destroyed, and another series of frescoes by Charles Le Brun in the Gallery of Hercules was heavily damaged by smoke and water. The restoration and renovation took a further three years. The restoration by Al Thani eventually cost €120m (£100m); the restored house showcasing a collection of French art and decorative works of the highest quality. These were sent to auction in a series of sales in 2022. In 2022, the house was sold to French telecom billionaire and art collector Xavier Niel for more than €200 million ($226 million) to be reportedly used as the headquarters for Niel’s cultural foundation. See also Alexis von Rosenberg, Baron de Redé Great Emigration (Wielka Emigracja) Union of National Unity (Związek Jedności Narodowej) Rothschild family Notes References External links Hôtel Lambert - from the Encyclopedia of 1848 Revolutions Petition for preservation of Hôtel Lambert Buildings and structures completed in 1644 Lambert November Uprising Politics of Poland Rothschild family residences France–Poland relations Great Emigration Buildings and structures in the 4th arrondissement of Paris 1644 establishments in France