An incunabulum (plural incunabula) is the name given to a book printed in Europe before the year 1501.
Printing was introduced to Europe by Johannes Gutenberg of Mainz, a German blacksmith and goldsmith. His invention of mechanical moveable type started the printing revolution and is considered one of the most important events of the modern period.
Special Collections in the Brotherton Library at the University of Leeds looks after over 300 incunabula. The majority of these are in the Brotherton Collection.