Vatican Obelisk
The city of Rome harbours the most obelisks 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.
At least eight obelisks created in antiquity by the Egyptians were taken from Egypt after the Roman conquest and brought to Rome.
At least five obelisks were manufactured in Egypt in the Roman period at the request of the wealthy Romans, or made in Rome as copies of ancient Egyptian originals.
(Pamphilius)
Erected on top of the Fontana dei Quattro Fiumi by Bernini in 1651.
There was also an Ethiopian obelisk in Rome, the Obelisk of Axum, 24 m, placed in the Piazza di Porta Capena. It had been taken from Axum by the Italian Army during the Italian occupation of Ethiopia in 1937. It was struck by lightning in May 2002. After being restored, it was disassembled and returned to Ethiopia in April 2005.
There are five well-known modern obelisks in Rome:
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Wikipedia