The city of Rome harbours thirteen ancient obelisks, the most in the world. There are eight ancient Egyptian and five ancient Roman obelisks in Rome, together with a number of more modern obelisks; there was also until 2005 an ancient Ethiopian obelisk in Rome.
The Romans used special heavy cargo carriers called obelisk ships to transport the monuments down the Nile to Alexandria and from there across the Mediterranean Sea to Rome. On site, large Roman cranes were employed to erect the monoliths.
Wikipedia https://en.wikipedia.org/wiki/List_of_obelisks_in_Rome
Address 30 Piazza Guglielmo Marconi, E.U.R. 00144, Italy
Coordinates 41°50'0.687" N 12°28'14.972" E