What 1455 book was the first ever printed using movable, reusable type?

The mid-15th century marked a pivotal moment in communication history thanks to the work of Johannes Gutenberg in Mainz, Germany. To demonstrate the power and quality of his revolutionary printing press, which used movable metal type, he undertook a monumental project: creating a complete edition of the Bible in Latin. Completed around 1455, this masterpiece of early printing is recognized as the first substantial book ever printed using this mass-production method.

These Bibles were not simple copies; they were works of art designed to rival the beautiful, hand-copied manuscripts of the era. Of the roughly 180 copies originally produced on paper and vellum, space was intentionally left in the margins and for large initials, allowing skilled artists to add vibrant, hand-painted illustrations later. The creation of this book didn't just prove a concept; it ignited the Printing Revolution. For the first time, knowledge could be replicated and distributed on a massive scale, paving the way for the rapid spread of ideas that would fuel the Renaissance, the Reformation, and the Age of Enlightenment.