Greece will begin capping the variety of guests to the Acropolis, authorities officers mentioned, an effort to curb overcrowding at its hottest archaeological web site amid wider worries concerning the impression of vacationers thronging European points of interest.

The cap of 20,000 guests a day will probably be examined starting Sept. 4, and comparable measures will probably be rolled out to different historic websites throughout the nation, in response to Greece’s tradition minister, Lina Mendoni. She mentioned the restrictions had been spurred by worries over potential harm to the positioning and the experiences of each workers members and guests.

“Obviously tourism is desirable for the country, for all of us,” Ms. Mendoni mentioned to Greek radio on Wednesday. “But we have to find a way of preventing overtourism from harming the monument.”

The restrictions on the traditional citadel above Athens come throughout a journey renaissance within the wake of the pandemic’s peak, with guests converging on European locations throughout the season’s zenith in July and August, undeterred by excessive airfares and lodge costs.

But that has introduced again issues about potential harm to culturally essential monuments, and anger amongst native residents over noise and overcrowding. In response, officers in lots of locations have stepped up insurance policies to deal with fears that points of interest — and extra broadly, cities — may turn out to be irrevocably modified by overtourism.

“Destinations want to take more control over tourism and have tourism more on their terms,” mentioned Ko Koens, a professor of latest city tourism at Inholland University of Applied Sciences in Amsterdam who has researched overtourism.

The Louvre in Paris, which attracted practically eight million guests final 12 months — a lot of them jostling to catch a glimpse of the Mona Lisa — has already restricted admissions to 30,000 a day. About 80 p.c of vacationer exercise is concentrated in 20 p.c of France, in response to the federal government, which desires to assist steer guests away from blockbuster locations to lesser-known areas.

In Italy, some seashores in Sardinia have begun requiring individuals to order entry slots on-line, whereas officers in Venice mentioned final 12 months that they might introduce a reservation system and entry fee for visitors, a part of an try and curb numbers within the fragile lagoon metropolis. Some points of interest, just like the convent that homes da Vinci’s mural “The Last Supper,” have restricted bookings.

In the Netherlands, Amsterdam has launched a raft of measures geared toward deterring disruptive tourists to its red-light district and stopping cruise ships from docking close to town heart.

Home to the Parthenon, the Acropolis had drawn as much as 23,000 guests every day, and customer numbers practically doubled within the first three months of this 12 months from a 12 months earlier. Beginning in September, entries will probably be break up up into hourly time slots throughout the web site’s opening occasions of 8 a.m. to eight p.m., lowering big traces and bottlenecks throughout peak hours, Ms. Mendoni mentioned. Limits is not going to be positioned, nevertheless, on how lengthy guests spend on the Acropolis.

“In this way we will seek to protect the monument, which is our main concern, as well as the visitors’ experience,” she added.

“Tourist visitation on the whole just puts wear and tear on these places,” mentioned Professor Koens. Other historic websites, together with the Cambodian temple advanced of Angkor Wat, have additionally imposed customer limits out of worry of potential harm.

But Professor Koens identified that the Acropolis hilltop can maintain giant crowds of individuals, and the truth that officers had been imposing a restrict signaled the depth of the customer numbers. “We’ve now reached a stage where so many people are going now that even they are starting to be overrun.”

The Acropolis additionally needed to contemplate the climate this summer time. During the heat waves that seared Greece final month, officers restricted customer hours after some vacationers fainted within the scorching afternoon warmth, and staff on the web site walked out over what they referred to as harmful working situations.

The query, Mr. Koens mentioned, that many common locations had been now mulling: “How do we prevent the visitor experience from becoming so detrimental on the local experience that it stops having value?”

Aurelien Breeden contributed reporting from Marseille, France, and Elisabetta Povoledo from Rome.