The Pavilion on Royal Hill is the only remaining Baroque building in the Castle Park with portraits of leaders of the Original Settlement and Hungarian kings. The hexagonal building, 200 meters from the castle, was built by Antal Grassalkovich I in the 1760's. In the 17-18th century, lodgings of lords were often made look like galleries. It was partly to express their nobility, partly to show their history in pictures.

Grassalkovich who came from a lower noble family and had an education in law, - as a result of his talent - completed a career rising high. He had an important in rising the Queen to the throne, since during the Austrian War of Succession (1740-48) it was Grassalkovich who organised the support of the Hungarian nobility. As a reward for the successful increase of the wealth of the chamber, Antal Grassalkovich the 1st was risen to the rank of a count by Maria Theresa in 1743, and also appointed as a secret councellor.

In the beginning, the suite of the Queen was characterized by her favoruite colour, violet. During the 1879 renewal, the colour of the silk wallpapers and upholstery was changed for red. The presence of the favourite colour is of special importancein this room since the furnishings here are meant to be suggestive of the Queen’s complex personality.