History of the Palace of Versailles but was never finished due to the king's death. Significant among Louis XV's contributions to Versailles were the "petit appartement du roi"; the "appartements de Mesdames", the "appartement du dauphin", the "appartement de la dauphine" on the ground floor; and the two private apartments of Louis XV – "petit appartement du roi au deuxième étage" (later transformed into the "appartement de Madame du Barry") and the "petit appartement du roi au troisième étage" – on the second and third floors of the palace. The crowning achievements of Louis XV's reign were the construction of the Opéra and the Petit Trianon.
Palace of the Shirvanshahs to the palace, stands a mausoleum, built in the second half of the 15th century, called the mausoleum of the "dervish" and known as the burial of the court scholar Khalil Ili Seyid Yahya Bakuvi, who was engaged in medicine, mathematics, and astrology. The mausoleum has an octagonal body, which completes the pyramidal tent. The interior of the mausoleum consists of an underground crypt where the tombstone of Bakuvi is located, and a camera above it. Small octagonal volume of the mausoleum turns into a drum covered with a dome. On the sides of the mausoleum there are three small