Grand Trianon Mansart; this wing, called "Trianon-sous-Bois", housed the Orléans family, including Louis XIV's legitimised daughter Françoise-Marie de Bourbon. The King's youngest grandson Charles de France and his wife Marie Louise Élisabeth d'Orléans also resided there. The Orléans family, who had apartments at the Palace of Versailles, were later replaced by Françoise-Marie's sister; the Duchess of Bourbon, "Madame la Duchesse" lived at the Trianon and later built the Palais Bourbon in Paris, the design of the palace being copied on that of the Trianon. In 1717, Peter the Great of Russia, who was studying the palace and gardens of Versailles, resided at
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