A faded Mediterranean Revival-styled pergola that is the main feature of a North Lawndale garden, created 120 years ago by Sears, Roebuck & Co., is now being restored.Work began Friday on the 100-foot long pergola at 3330 W. Arthington St. The structure is the centerpiece of the nearly 2-acre garden built in 1907 as a rest spot for employees at what was then Sears' sprawling campus headquarters."People are going to be amazed by the work," the Re…