Rodolfo Amedeo Lanciani,
Pagan and Christian Rome
“ Were we in the presence of the remains of the famous Capitolium, or of one of the smaller temples within the Arx? To give this query a satisfactory answer, we must remember that the Capitoline Hill had two summits, one containing the citadel, or Arx, the other the Temple of Jupiter Optimus Maximus, the Capitolium. Ancient writers never use the two names promiscuously, or apply them indifferently to either summit or to the whole hill. The name of the hill is the Capitoline; not the Capitol, which means exclusively the portion occupied by the great temple. ”
