When did Johannes Gutenberg invent the printing press and how many books were produced in his lifetime?
Johannes Gutenberg invented the printing press in 1450 and ignited a revolution that made eight million books available to humanity within a single lifetime. This figure surpasses the total output of all scribes in Europe since the founding of Constantinople in 330 AD. The invention of movable type transformed books from rare artifacts into commodities produced with increasing speed and decreasing cost.