LONDON, ONTARIO—  The leaf acquired by Western University comes from a first edition copy of Chaucer's The Canterbury Tales, printed by William Caxton in 1476, the first book printed in the English speaking world. More than 500 years  later, a leaf from one of those copies is in the collection of Western University. Western paid over CAD$20,000 to acquire the page. A complete copy of The Canterbury Tales is worth  well over $1 million. It’s is not known exactly how many copies Caxton printed of the book in 1476, but it’s estimated that about 10 complete first edition copies exist now, along with roughly three dozen fragments of pages in collections the world. William Caxton made history when he established the first printing press in the English speaking world and used it to produce copies of the country’s first printed book "The Canterbury Tales".  When Johannes Gutenberg of Germany introduced the first movable-type printing press in Europe in the mid 15th century, it ushered in a new era of communication and sparking the proliferation of printing presses across the world. Western University  say the historic leaf will be used as a hands-on learning tool for students at the university studying medieval literature.