Butser Ancient Farm is an archaeological open-air museum and experimental archaeology site located near Petersfield in Hampshire, southern England. Butser features experimental reconstructions of prehistoric, Romano-British and Anglo-Saxon buildings. Examples of Neolithic dwellings, Iron Age roundhouses, a Romano-British villa and an early Saxon house are on display. The site is used as both a tourist attraction and a site for the undertaking of experimental archaeology. In this latter capacity, it was designed so that archaeologists could learn more about the agricultural and domestic economy in Britain during the millennium that lasted from circa 400 BCE to 400 CE, in what was the Late British Iron Age and Romano-British periods.