1885 Board of Trade Building, Archives and Special Collections, Kathryn A. Martin Library, University of Minnesota Duluth Did you know that the Board of Trade building on the corner of 3rd Ave W and 1st Street was the fifth home of the Duluth Board of Trade? Perhaps you've heard about the two Board of Trade buildings, but what happened to their other homes? And what even is a “board of trade?” The story of Duluth’s Board of Trade begins, as many Duluth stories do, with Phila