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Bennett, Parsons and Frost, designed to duplicate the shape of the Capitol Dome with the fountain on the north side of Capitol Hill.  It began operation in 1932. (Photo by Andrea Mohin/CQ Roll Call via Getty Images)

Bennett, Parsons and Frost, designed to duplicate the shape of the Capitol Dome with the fountain on the north side of Capitol Hill. It began operation in 1932. (Photo by Andrea Mohin/CQ Roll Call via Getty Images)

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