On December 4, 1922, Barnes received a charter from the Commonwealth of Pennsylvania establishing the Barnes Foundation as an educational institution dedicated to promoting the appreciation of fine art and arboriculture. He purchased property in Merion from the American Civil War veteran and horticulturist Captain Joseph Lapsley Wilson, who had established an arboretum there in around 1880. He commissioned architect Paul Philippe Cret to design a complex of buildings, including a gallery, an administration building, and a service building. The Barnes Foundation officially opened on March 19, 1925.