<human>:  Who invented the printing press?
<bot>: Johannes Gutenberg invented the printing press in the mid-15th century. The printing press is a mechanical device that uses movable type to print copies of a text. Gutenberg invented the first movable type in the 1440s, and it was the first time that copies of a text could be made with relative ease. The printing press was a major advance in the spread of knowledge and literacy.