1 Courtesy of the Concord Historical Society Zoom

Ask an old-timer about the handsome architecture that Concord lost on the way to progress, and he or she is likely to bring up the old Boston & Maine railroad depot. Here’s a South End landmark that served thousands of Concord residents, a structure whose tale will be told in “Crosscurrents of Change,” the history of Concord in the 20th century. What was it?

The answer will be printed in next week’s Insider. Can’t wait that long? Check out the website of the Concord Historical Society at www.concordhistoricalsociety.org.