The Bahia Palace () is a mid to late 19th-century palace in Marrakesh, Morocco. The palace was first begun by Si Musa, grand vizier under the Alawi sultan Muhammad ibn Abd al-Rahman, in the 1860s. It was expanded by his son Si Ba Ahmed ibn Musa, grand vizier of Sultan Moulay Abdelaziz, between 1894 and 1900. Today it is a well-known historic monument and tourist attraction in the city.
The palace has an irregular layout comprising around 150 rooms organized around multiple internal courtyards and riad gardens.
Among the existing parts of the palace today, the "Grand Riad" or large riad garden and its adjoining rooms in the northern part of the palace date from Si Musa's time and are also consequently known as the Dar Si Moussa. The two chambers on the east and west sides of the garden contain an inscription which dates their construction to 1866–7. As Abdelaziz was only sixteen, Ba Ahmed became the effective ruler of Morocco until his own death from disease in 1900.
thumb|upright|The Small Riad, photographed in 1920
Ba Ahmed was responsible for constructing most of the Bahia Palace's southern parts, which include various smaller courtyards and riad gardens. The entire palace was built on one level, possibly as Ba Ahmed's own physique (which was described as stout and obese) made it more difficult for him to go up and down stairs. The palace is occasionally still used by the King of Morocco to receive foreign dignitaries or host events.<!--In the cited article (Medias24), click on the site of the palace in the map of Marrakesh in order to see annotations with the full details.--> The palace was subsequently closed for repairs and was reopened to visitors in October 2023.<!--In the cited article (Medias24), click on the site of the palace in the map of Marrakesh in order to see annotations with the full details.-->
Architecture
Layout
The palace's labyrinthine layout, which does not reveal a clear unified plan, is due to the fact that it was expanded in a piecemeal fashion in different stages over many years. A minor courtyard leads into the Small Riad (), a square courtyard garden divided by walkways along its two central axes and surrounded by richly decorated galleries and chambers. A second floor apartment above this riad was added by Madani el-Glaoui after Ba Ahmed's death. On the south side of the palace are other annexes includes stables and a mosque with a minaret.