The British Library is the national library of the United Kingdom and the largest library in the world by number of items catalogued. A Grade I listed building, the library is a major research library, holding around 170 million items from many countries, in many languages and in many formats, both print and digital: books, manuscripts, journals, newspapers, magazines, sound and music recordings, videos, play-scripts, patents, databases, maps, stamps, prints, drawings. The Library's collections include around 14 million books, along with substantial holdings of manuscripts and historical items dating back as far as 2000 BC.