Last Tuesday morning, people around the world were shocked to hear that the Louvre Museum in Paris had been robbed. The famous museum, home to the Mona Lisa and thousands of other artworks, reported that one of its paintings — The Fortune Teller by Caravaggio — had been stolen overnight.

Police say the thieves broke in through a tunnel that was being used for maintenance work under the museum. Security cameras caught three masked people moving through the halls around midnight. They cut the power for about nine minutes, which was just enough time to take the painting and escape before alarms went off.

“This wasn’t random,” said Captain Elise Moreau from the Paris police. “They knew exactly what they were doing.”

So far, no one has asked for ransom money, and there haven’t been any major clues. Investigators think the painting might already be in the hands of a private collector who will keep it hidden. Experts say stolen art often ends up on the black market, where it can be sold for millions of dollars.

The Louvre reopened the next day, but people could see the empty spot on the wall where The Fortune Teller used to hang. The museum’s director, Claire Dujardin, said, “This painting belongs to the world. We will do everything we can to bring it home.”

Police from all over Europe are now helping with the case. Interpol has issued an alert, and airports and borders are being watched closely. Even though the investigation is moving fast, art experts say it could take years to find the missing painting.

For now, the Louvre stands as a reminder that even the most protected treasures in the world can disappear in a single night.