Johannes Gutenberg's first job was with a goldsmith at Strasbourg, Germany. He began a printing operation in the 1430s, and legend says he and his partners were working on a secret invention of movable type. A partner died, and following an attempt at legal action, Gutenberg returned to his native Mainz. There he demonstrated movable type, an idea he obtained from a type of printing used in making playing cards and prints from woodblocks. With financial support from Johann Fust, Gutenberg produced the "42-line Bible," which had 42 lines per column. The project was completed in 1456.