People were stunned in October when thieves broke into the Louvre—a world-famous art museum in Paris—in broad daylight and made off with eight of France’s historic crown jewels, worth about $100 million. Soon after, the Associated Press published this photo of police officers blocking the museum entrance. What happened next is an example of how fame can come in an instant in the social media era. The photo quickly went viral because of the dapper young man on the right, wearing a buttoned vest, trench coat, and fedora. Theories multiplied about who he could be. A Sherlock Holmes-inspired detective assigned to the case? An A.I.-generated image? Or merely a bystander? Weeks after the heist, all was revealed: He turned out to be Pedro Elias Garzon Delvaux, a 15-year-old from Rambouillet, France, who had tried to visit the museum the morning of the heist. Pedro told reporters he was amused to be an internet fixation. He said that his fashion sense is inspired by old movies and figures from 20th century history, such as Jean Moulin, one of the leaders of the French Resistance against Nazi Germany. “I like to be a gentleman,” he says. “It’s important to be chic.”