Subsidiary structures of the Palace of Versailles for prime ministers during the fifth Republic—effectively forming a pendant to the Grand Trianon, which has been until recent years the vacation residence for the French president. Since 2007, "La Lanterne" has also served as a retreat for the French president, on the grounds of its seclusion and its relative anonymity, thus providing a level of security that is difficult to maintain at the Grand Trianon due to the hordes of tourists visiting the building and gardens. Building The estate is adjacent to the Park of Versailles and situated on the road that links Versailles with Saint-Cyr-l'École. The estate includes
Palace of the Shirvanshahs reservoir, which was one of the largest in the Fortress of the Ovdans. This ovdan supplied drinking water not only to the palace, but also to the entire surrounding area. This assumption is confirmed by the nearby small, built in the XIV century Chin Mosque, which is believed to have served the residents of the nearby area. Ovdan supplied water to the palace bathhouse. Ovdan is a spacious reservoir located deep underground, which was ventilated by means of a special vertical shaft. Such a structure is typical for most of the ovdans surviving till the present day. To descend into