For two weeks in February, walkways in Central Park will be festooned with 23 miles of saffron-colored fabric gates by the artists Christo and Jeanne-Claude in a public art project they have sought to do for 23 years. The artists had unsuccessfully been trying for years to win city approval for the piece, titled "The Gates, Central Park, New York, 1979 to 2005," until Mayor Michael Bloomberg, who is a patron of the arts, agreed to it. Beginning next month, 7,500 16-foot metal frames designed to hold the fabric will be erected throughout the park at 15-foot intervals. The fabric...