This hilltop museum with sweeping views of the Roman Campagna is located in the smallest yet most sacred of Rome's seven hills. In the 6th century, it used to be the sacred site of the earliest and most powerful Roman temples dedicated to the god Jupiter where several victorious and religious processions culminated to pay homage to the supreme god. Whilst digging the foundations of this grand edifice, the workers made a fortuitous yet macabre discovery of a severed human head or ‘caput’ that…