The Arc de Triomphe, the French capital's beloved monument on the famous Champs Elysees, will close for two months of repairs beginning Monday, officials said Friday. Work on the arch already is under way to repair damage from water and pollution. The arch is to be closed to permit work on its foundation. It will reopen to the public Dec. 15, officials said. The $5.6 million project is being paid for by government and private contributions. The arch, 164 feet by 148 feet, was commissioned in 1806 by the Emperor Napoleon to commemorate his military victories. The tomb of the unknown soldier lies beneath it.