The majestic Hall of Columns has its ceiling frescoes by Italian painter Corrado Giaquinto (who also painted the staircase decorations) and the beautiful Brussels tapestries designed by Raphael. In this room you can admire many portraits of kings and queens, as well as marble busts of Roman emperors. In fact, the main theme of the palace's decorations is royalty exerted on the world, or a kingship passed down from the ancient emperors to the kings of Spain, who ruled on two continents.