This week in Paris, the executive board of Unesco, the United Nations entity charged with looking after matters related to education, science and culture, will vote on a resolution called “Occupied Palestine,” which attempts to redefine the capital of Israel as a supranational city to which Muslims, Christians and Jews have equal claim.

Perhaps not coincidentally, an exhibition currently at the Metropolitan Museum of Art in New York City makes the same case. For the sake of Jerusalem, both need to be exposed as the attempts at historical revisionism that they are.

Jerusalem has been a busy patch of earth over the course of its history and a magnet for people of many faiths—first Jews, then Christians, then Muslims—becoming over the millennia a location of cultural fascination. The “Jerusalem 1000-1400: Every People Under Heaven” exhibition at the Met is a case in point. The show highlights the spectacular objects produced in and around the medieval city that continue to inform its modern aesthetic. It is in many ways a curatorial tour de force and must have entailed all manner of diplomatic wrangling to garner so many loans of such delicate, irreplaceable objects.

But there is an elephant in this tastefully curated gallery. At its heart, this is a show about the identity of Jerusalem, as contentious a topic a thousand years ago as it is today, as is evidenced by the Unesco resolution. The exhibition’s premise, as is encapsulated in its title, is that during the medieval period, all claims to the city were equal and inhabitants were uniformly defined by their participation in this unique community.

This interpretation is implicitly projected onto the modern Jerusalem as photographs of the contemporary city appear on the gallery walls next to the explanatory texts. The visitor is encouraged to conclude that if only adherents of the three major religions—Christianity, Judaism and Islam—would understand themselves as citizens of Jerusalem, a city transcending national boundaries, this utopia could be recaptured. The organizers are careful to mix up the order of the three religions as listed in written materials to avoid the appearance of preferential treatment.