Johannes Gutenberg's work on his printing press began in approximately 1436 when he partnered with Andreas Dritzehen – a man he had previously instructed in gem-cutting – and Andreas Heilmann, the owner of a paper mill. It was not until a 1439 lawsuit against Gutenberg that an official record exists; witness testimony discussed type, an inventory of metals (including lead) and his type mold.
Compared to woodblock printing, movable type page setting and printing using a press was faster and more durable. The metal type pieces were sturdier and the lettering more uniform, leading to typography and fonts. The high quality and relatively low price of the Gutenberg Bible (1455) established the superiority of movable type for western languages, and printing presses rapidly spread across Europe, leading up to the Renaissance, and later all around the world. Today, practically all movable type printing ultimately derives from Gutenberg's innovations to movable type printing, which is often regarded as the most important invention of the second millennium