Opened on 25 March 2012 on the Quai de la Fosse -- the departure point for many of the roughly 1,800 slaving expeditions that sailed from Nantes, France's leading slave-trading port during the 18th and 19th centuries -- this is the largest memorial of its kind in Europe. A 400-meter walkway along the Loire is lined with 2,000 embedded glass plaques: 1,710 name the individual slave ships and their departure dates, and 290 name the trading posts and ports of sale across Africa, the Americas, and the Indian Ocean. A 90-meter underground passage beneath the quay evokes the confinement of captives in a ship's hold and leads visitors past glass panels bearing the Universal Declaration of Human Rights and the word 'Liberty' in 47 languages.