The Columbian press is a type of hand-operated printing press invented in the United States by George Clymer, around 1813. Made from cast iron, it was a very successful design and many thousands were made by him and by others during the 19th century. Columbians continued to be made as late as the early-20th century, 90 years after their introduction. Despite their age, many are still used for printing, especially by artists who make prints using traditional methods.