The National Maritime Museum (NMM) is the leading maritime museum of the United Kingdom, and one of the most important in the world. It is based primarily in Greenwich, London, adjacent to Greenwich Park. The NMM houses a wide and varied collection of exhibits relating to Britain's extensive naval heritage; items range from ships' anchors to royal rowing barges, from naval uniforms to paintings of naval heroes and explorers.
In addition to its open exhibits the Museum houses an extensive archive of objects and documents relating to seafaring, navigation and ships. Much of this collection is available online.