By THOMAS ADAMSONPARIS (AP) â¿¿ An Italian artist decorated the Louvre museum's glass pyramid Wednesday for the first time in the iconic monument's history, in a protest against capitalism. The artwork, a huge three-looped infinity sign made of mirrors, faces due west onto France's business district, La Defense. Michelangelo Pistoletto, one of the world's leading conceptual artists, covered one panel of the pyramid with the reflective symbol that's meant as a defiant political gesture: Politicians and society must look at follies of excess that led to the global financial crisis. It had spectators gawping â¿¿ some in awe, others in confusion. "It's fantastic. It's like an eye looking out onto what Paris has become: finance, greed," one spectator, Fabrice Bing, said. Another onlooker, Anthony Cuvillier, was less certain: "I don't know what it means, but it definitely looks cool." Pistoletto, one of the main exponents of "Arte Povera," an influential movement that uses poor and everyday materials in art to protest against consumerism, has no doubt as to his art's message. "Politicians should look at themselves in the mirror, and learn to take responsibility for this terrible mess and think of the infinite future ahead for humanity," he told The Associated Press. Pistoletto is the first artist the Louvre has invited to work on the outside of the pyramid, the large glass and metal structure, designed by architect I. M. Pei, that was commissioned nearly 30 years ago â¿¿ to great controversy â¿¿ by former President Francois Mitterrand. The installation continues deep inside the museum in more than a dozen separate works that the artist has "hidden" among the sprawling classical antiquities, made from mirrors and secondhand rags. "It's a mystery. The public is asked to come on a treasure hunt," said curator Marie-Laure Bernadac, who agreed that the works will appeal to the many tourists who still come and see the pyramids because of the mysterious associations from Dan Brown's best-selling book "The Da Vinci Code."