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The earliest dated printed book known is the "Diamond Sutra", printed in China in 868 CE. However, it is suspected that book printing may have occurred long before this date. In 1041, movable clay type was first invented in China. Johannes Gutenberg invented the printing press with replaceable wooden or metal letters in 1436 (completed by 1440).
The Gutenberg press with its wooden and later metal movable type printing brought down the price of printed materials and made such materials available for the masses. It remained the standard until the 20th century. During the centuries, many newer printing technologies were developed based on Gutenberg's printing machine e.g. offset printing.