Under the monumental Rome lies another Rome with its fascinating & unsuspected treasures of art & history. There are nympheums, places of pleasure & physical & spiritual refreshment; columbaria with their astonishing funerary architecture; & hypogeums & underground passages that still preserve precious works of art beneath churches, palaces & even in the basements of unpromising-looking houses. However, subterranean Rome does not consist only of mysterious & sacred places, for we also find urban & secular structures like the quarters of the Seventh Cohort of Guards, or the famous Golden House, the Domus Aurea. This text provides a cross-section that best embodies the variegated panorama of subterranean Rome.