Rudolph Johann Joseph Rainier, Archduke of Austria, Prince Royal of Hungary and Bohemia, Cardinal-Archbishop of Olomouc, was a member of the House of Habsburg-Lorraine, and an Austrian clergyman and noble. He was consecrated as Archbishop of Olomouc (Olmütz) in 1819 and became cardinal in the same year. Rudolph is known for his patronage of the arts, most notably as sponsor of Ludwig van Beethoven, who dedicated several of his works to him.

Infanta Maria Luisa of Spain was Holy Roman Empress, German Queen, Queen of Hungary and Bohemia, and Grand Duchess of Tuscany as the spouse of Leopold II, Holy Roman Emperor.