The Invention of Melbourne defines the relationship between an architect of genius, William Wardell, and the first Catholic Archbishop of Melbourne, James Goold, an Irishman educated in Risorgimento, Italy. Their partnership produced St Patrick's, the largest cathedral of the 19th century anywhere in the world, and some thirteen churches, decorated with hundreds of Baroque paintings. These ambitious policies coincided with the Gold Rush, which contributed financially to their success. The contribution made by Wardell and Goold to the built environment of Melbourne remains significant. Together, they actively and creatively shaped the city that became a major international metropolis.