Fonterutoli is the headquarters of the Mazzei company and the heart of the Castello di Fonterutoli estate, which extends over 650 hectares (1600 acres), 117 hectares (290 acres) of which are under vine. Over time, new vineyards were added, scattered across the estate, to form a fascinating mosaic of plots that vary in altitude from 220 to 570 metres (720-1870 ft) above sea level. This is just one of the elements that makes Fonterutoli so unique.