In 2019, the finishing of the unique Lyons hall will be completed, the restoration of which began in 2005. The work was carried out in stages due to the high cost and complexity of the process. At the moment, the sponsors helped to recreate the lapis lazuli portals at the door of the room. Funds have already been allocated for the restoration of the plafond and mosaic panels, which are decorated with precious metals, textiles for decoration of the hall, and upholstery of the walls. The decor was lost during the Great Patriotic War. The room itself was originally part of the chambers of Catherine II. From the furniture ensemble there are only 25 items left. They were made with the use of lapis lazuli and upholstered in Lyons silk. The same material was used for wall finishing.