People visit Louvre-Lens, a regional branch of Louvre Museum in Lens, northern France, Dec. 16, 2012. Louvre-Lens housing hundreds of Louvre treasures opened to the public on Wednesday. (Xinhua/Gao Jing)

People visit Louvre-Lens, a regional branch of Louvre Museum in Lens, northern France, Dec. 16, 2012. Louvre-Lens housing hundreds of Louvre treasures opened to the public on Wednesday. (Xinhua/Gao Jing)

People visit Louvre-Lens, a regional branch of Louvre Museum in Lens, northern France, Dec. 16, 2012. Louvre-Lens housing hundreds of Louvre treasures opened to the public on Wednesday. (Xinhua/Gao Jing)

People visit Louvre-Lens, a regional branch of Louvre Museum in Lens, northern France, Dec. 16, 2012. Louvre-Lens housing hundreds of Louvre treasures opened to the public on Wednesday. (Xinhua/Gao Jing)

People visit Louvre-Lens, a regional branch of Louvre Museum in Lens, northern France, Dec. 16, 2012. Louvre-Lens housing hundreds of Louvre treasures opened to the public on Wednesday. (Xinhua/Gao Jing)

People visit Louvre-Lens, a regional branch of Louvre Museum in Lens, northern France, Dec. 16, 2012. Louvre-Lens housing hundreds of Louvre treasures opened to the public on Wednesday. (Xinhua/Gao Jing)

People visit Louvre-Lens, a regional branch of Louvre Museum in Lens, northern France, Dec. 16, 2012. Louvre-Lens housing hundreds of Louvre treasures opened to the public on Wednesday. (Xinhua/Gao Jing)