<prompt> Translate the following text to SwahiliThe elegant 17th- and 18th-century facades of the Palais des Ducs conceal the underlying Renaissance structures of the dukes heyday, but many of their treasures remain to be seen inside, in the Musee des Beaux-Arts.  <response>: Jengo la Palais des Ducs, ambalo lilijengwa katika karne ya 17 na 18, lina majengo ya kale ya Renaissance, lakini bado kuna vitu vingi vya kipekee vya kihistoria katika nyumba hiyo. 