Two tourists from California were arrested in Rome on Saturday for allegedly carving their initials into the ancient Colosseum and taking a selfie, Italian media reported.

The women, ages 21 and 25, reportedly left their tour group and used a coin to engrave the letters J and N some 3-inches high into the walls of the ancient World Heritage site.

The two women have been charged with aggravated damage on a building of historical and artistic interest.

From La Repubblica -

“We apologize for what we did,” the pair reportedly said. “We regret it, but we did not imagine it was something so serious.

“We’ll remember for a lifetime.”

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