Photo of, left to right, John Swenson, his sons Omar Swenson and Guy Swenson, and Origin Downing, a former business partner of John Swenson. An immigrant from Sweden, John Swenson founded the Swenson Granite Company in Concord in 1883. Swenson Granite Company (later Swenson Granite Works) provided granite for building projects in New Hampshire and across the country, including the New Hampshire Historical Society building in Concord, the Library of Congress in Washington, D.C., and the Tomb of the Unknown Soldier in Arlington, Virginia. Swenson was a family-owned and operated company for four generations. It is still in operation today as part of Polycor Inc.