In the Great Hall of the Fairy Castle is this miniature replica of the oil painting known as the Portrait of Count-Duke de Olivares. Olivares was prime minister of Spain from 1621-1640, and the original portrait was completed in 1635 by the Spanish artist Diego Velázquez (1599-1660). This miniature replica was painted by James Montgomery Flagg (1877-1960) who is best remembered for his political posters, including the 1917 painting of Uncle Sam created for United States Army recruitment posters during World War I.

The Great Hall with floating staircase is a grand room with many treasures. The floor is composed of ivory carved with rose vines which carry up onto the great pillars supporting the ceiling. The ceiling includes domes painted by Helga Brabon of characters from fairytales of both the Grimm brothers and Hans Christian Anderson. The Great Hall includes many hanging wall paintings as well as many rare treasures gathered from around the world.