When many readers in Toronto, London, Paris and Hong Kong open their newspapers on Monday, they will be greeted with a full-page advertisement from the Metropolitan Museum of Art in New York. “We reopened in August 2020, but have been missing one critical thing — you, our international visitors,” the ad will say. “The Met is only The Met when it is being enjoyed daily by visitors from around the world.” The unusual display — museum officials say they do not believe they have ever run a global marketing campaign of this scope aimed at visitors so far from their