The world-renowned outdoor museum Pompeii in Italy will introduce a maximum limit of 20,000 visitors per day.
The new rules mean that visitors must purchase personal tickets, which during the summer will be divided into morning and afternoon times.
Gabriel Zuchtriegel, head of the museum, says that the measure is being introduced to better manage the number of visitors as they increase.
The idea is not to close Pompeii, but to expand Pompeii and better manage the flow, he says at the launch of the rules at the historic site near Naples in southern Italy.
Last year, more than four million people visited Pompeii, an ancient Roman city that was buried when Vesuvius erupted nearly 2,000 years ago. The museum estimates that this year's visitor numbers will be even higher.
