While hundreds of tourists might have expected to see some sights at Rome's Colosseum, an unexpected visit from Prince Harry was probably not on their list.
A group of visitors from America and Canada found themselves alongside the prince as a guide explained some of the building's history to him.
Harry finished off a two-day visit to Rome, where he has been commemorating the Second World War victory at Monte Cassino, with a private tour of the amphitheatre.
The Colosseum was built between 70 and 80 AD and hosted gladiatorial combats, animal hunts and shows for the Roman emperors.
Receiving a welcome not dissimilar to the Roman rulers themselves, Harry's appearance at the Colosseum prompted cheers from the higher galleries and shouts of 'Prince Harry!'
The Quenneville family from Canada - who were stood by the royal - described their reaction to his unexpected appearance.
– Quenneville family
"It was the highlight of our visit.
It was crazy. It was unbelievable. Better than the Colosseum."
After visiting the Colosseum, Harry continued his tour of Rome's iconic - stopping off at the Trevi Fountain, Campidoglio, Piazza Montecitorio, the Pantheon and Aventine Hill before heading to the airport.