King Charles III's apartment, on the first floor of the Royal Palace, has four rooms with well-preserved and original eighteenth-century furnishings. The parlor and waiting room have two ceiling paintings by Anton Raphael Mengs, a painter of German origin who was trained in Rome. He was a cultured and strict early exponent of neoclassicism who directly contrasts the bizarre rococo imagination of Tiepolo. You'll also see Roman marble busts and portraits by Goya before finally reaching the king's bedroom.