Agrippina the Elder
At the beginning of the Imperial Age, magnificent "Villae" (country houses) and "Horti" (Gardens), such as those owned by Agrippina the Elder, wife of Germanicus and mother of Caligula ("Horti Agrippinae"), and by Domitia Longina, wife of Domitianus ("Horti Domitiae"), were built near the slopes of the Gianicolo and Vatican hills.