The Gutenberg Press was invented by Johannes Gutenberg in the mid-15th century. It introduced movable type printing, which allowed for the mass production of books. This innovation significantly reduced the cost of printing and made literature more accessible to the general public, leading to an increase in literacy rates across Europe. The first major book printed using the Gutenberg Press was the Gutenberg Bible, completed around 1455. This marked the beginning of the Printing Revolution, which transformed the way information was disseminated and played a crucial role in the spread of the Renaissance and the Reformation.