“Pioneer Jim” Williams, left, and an unidentified assistant placed the cornerstone for the Lexington Civic Center on a wooden carrier during Lexington’s bicentennial celebration on June 14, 1975. The cornerstone came from the 200-year-old John Hancock House in Lexington, Mass., and Williams transported it in a horse-drawn covered wagon. Lexington celebrated its 200th anniversary with a three-day festival that included a flag-raising, a parade, the cornerstone dedication, six music stages and a prayer service. Photo by Ron Garrison | Staff