The National Maritime Museum is the largest maritime museum in the world. It forms part of the Royal Museums Greenwich UNESCO World Heritage Site. The NMM houses ten galleries that all showcase Britain’s Maritime History. Its mission is 'to enrich people’s understanding of the sea, the exploration of space, and Britain's role in world history’. ‘The Atlantic Worlds Gallery,' launched in 2007 for the commemoration of the bicentenary, charts the interconnections between Britain, Africa and the Americas between 1600 and 1850. The gallery is about the movement of people, goods and ideas across and around the Atlantic Ocean from the 17th century to the 19th century. The connections created by these movements affected people across three continents, impacting on their cultures and communities and shaping the world we live in today. Four main themes are explored within the gallery, including exploration, war, enslavement and resistance. These displays benefited extensively from the museum's purchase of the Michael Graham-Stewart Slavery Collection in 2002. 'Atlantic Worlds' charts the triangular trade through African civilisations, enslavement and the Middle Passage, and the abolition movement. It recounts the stories of some of the people involved in the resistance movement and the campaign for the abolition of the transatlantic slave trade – including Toussaint l’Ouverture, Olaudah Equiano and Samuel Sharp whose acts of resistance and rebellion were crucial to the turning of European public opinion against the trade. Its narrative also goes beyond the achievement of legal abolition in Britain, to include discussions of the Royal Navy's involvement in suppressing the trade world wide.