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Unknown visitor to the nearly 2,000-year-old Colosseum in Rome has sparked controversy in Italy after he was caught on camera writing his name and the name of his ostensible girlfriend into a wall at the historic location.

The tourism and culture ministers of Italy have vowed to track down and prosecute the traveller who was caught scratching "Ivan+Haley 23" into a Colosseum wall.

As the man wrote the phrases into a brick wall with his keys, fellow tourist Ryan Lutz videotaped the incident and shared it online.

"Man, are you serious?" As he records the rude tourist, Lutz asks. "That's a f—ed up, man."