June 22, 2015 - Tech-savvy art historian Andrew Tallon uses lasers to unlock the builders' secrets behind the construction of the National Cathedral in Washington, D.C.
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"
Historian Uses Lasers to Unlock Mysteries of Gothic Cathedrals"
Editor's Note: Andrew Tallon died in 2018, but his work of laser scanning cathedrals, including Notre Dame, will live forever.
