The Leverian collection was a natural history and ethnographic collection assembled by Ashton Lever. It was noted in particular for the content it acquired from the voyages of Captain James Cook. For three decades it was on display in London, being broken up by auction in 1806. The first public location of the collection was the Holophusikon, also known as the Leverian Museum, at Leicester House, on Leicester Square, from 1775 to 1786. After it passed from Lever's ownership, it was displayed for nearly twenty years more at the purpose-built Blackfriars Rotunda just across the Thames.