Greenfield, also known as Col. William Preston Plantation, Preston House, and Botetourt Center at Greenfield, is a historic plantation site located at Fincastle, Botetourt County, Virginia. The first plantation established by surveyor, militia officer and burgess William Preston (1729-1783) and which used enslaved labor beginning with his purchase of 16 Africans from the ship True Blue on August 28, 1759 in Nanjemoy, Maryland for 752pounds, Greenfield became one of Botetourt County's largest plantations, encompassing more than 1,200 acres by the 1770s. In 1774 Col. Preston moved his family to another plantation, Smithfield, and a series of white overseers managed the farm, orchard and distillery at Greenfield.