Largest museum (items on display)

The Smithsonian Institution comprises 16 museums and the National Zoological Park in Washington, DC, USA. It contains over 140 million items and has over 6000 employees.
The American Museum of Natural History in New York City, USA, founded in 1869, comprises 23 interconnected buildings. The buildings of the Museum and the Planetarium contain 111,000 m² (1.2 million ft²) of floor space, accommodating more than 30 million artifacts and specimens, and the museum attracts approximately 3 million visitors each year.

The largest and most visited museum in the United Kingdom is the British Museum (founded in 1753), which was opened to the public in 1759. The main building in Bloomsbury, London was begun in 1823 and has a total floor area of 8.7 ha (21.5 acres). In 1994, 6,286,838 people passed through its doors.