Wallpaper has been used for interior decoration since ancient times. The earliest forms of paper were developed in China in the 2nd century BC and papermaking spread from there to the Middle East and Europe over subsequent centuries. By the 16th century, wallpaper with printed repetitive patterns was being produced in Europe. Throughout the 18th and 19th centuries, innovations such as machine printing allowed wallpaper manufacturing to scale up and designs to become more intricate, making wallpaper a widespread decorative feature in homes.