One of the seven hills of Rome ( Roma), located on the right bank of the Tiber and already during the Republican period connected to the Campus Martius by four bridges. Because of its military significance, the I. was incorporated into the ager Romanus at an early date (Cass. Dio 37,27,3 - 37,28,1). The name I. probably refers to a cultic site of Ianus. In the later Republic this hill, which was traversed by the via Aurelia was the location of several large gardens (horti Agrippinae; horti Caesaris).
Bibliography
P. Liverani, s.v. I., LTUR …