I’d probably question that given how many cities want to be a new rome and how famous Rome’s seven hills are. It’s easy to pick any collection of seven hills in a city that has more hills than that and say they’re ‘the’ seven hills of the city.
Monte Testaccio is an artificial mound in Rome composed almost entirely of testae (Italian: cocci), fragments of broken ancient Roman pottery, nearly all discarded amphorae dating from the time of the Roman Empire[.]