The Walters Art Museum, located in Mount Vernon-Belvedere, Baltimore, Maryland, United States, is a public art museum founded and opened in 1934. It holds collections established during the mid-19th century. The Museum's collection was amassed substantially by major American art and sculpture collectors, a father and son: William Thompson Walters, (1819–1894), who began serious collecting when he moved to Paris as a nominal Southern/Confederate sympathizer at the outbreak of the American Civil War in 1861; and Henry Walters (1848–1931), who refined the collection and made arrangements for the construction of a later landmark building to rehouse it.