The 19th Century was the Age of Pictures, when imagery of all types multiplied and entered everyday life. A key agent was the new medium of lithography. Lithographic printing was seen in postcards and letterheads, labels and wrappers, and tickets and show bills. Framed lithographic prints hung in parlors, lobbies, and offices. The marvelous world of American lithography reached its apex through the wave of Europeans who immigrated after the Revolution of 1848 and brought advances in technique and art.