Over the past decade or so, Littleton, Mass., masonry contractor Mike DeBlasio has completed a number of challenging projects for Boston’s Museum of Fine Arts. But late last year, the MFA handed DeBlasio and a hand-picked team of specialty subcontractors a truly monumental challenge: helping museum conservators move a recently purchased 1,900-year-old marble figure of Juno from a private estate in Brookline, Mass., to the museum, a five-mile trip by road.At 13 feet 8 inches, Juno (wife of the Roman god Jupiter) was the largest classical sculpture in the U.S. But the harsh New England climate had not been kind...

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