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Printing Press, the best invention ever in the history. Invented in the Holy Roman Empire by german Johannes Gutenberg around 1440, based on existing screw presses. The arrival of mechanical movable type printing introduced the era of mass communication, which permanently altered the structure of society. The printing press could print 1000’s of pages per day versus only 40-50 pages with the old method. This was a dramatic improvement and allowed books to be acquired by the middle class for the first time in the history of Europe. Knowledge and education spread throughout the continent like never before.