In 1928 sculptures depicting scenes from Chicago 's history were added to the outward-facing walls of the four bridgehouses . The sculptures on the northern bridgehouses were commissioned by William Wrigley , Jr. , and are by James Earle Fraser : '' The Discoverers '' depicts Louis Joliet , Jacques Marquette , René-Robert Cavelier , Sieur de La Salle and Henri de Tonti ; '' The Pioneers '' depicts John Kinzie leading a group through the wilderness . The sculptures on the southern bridgehouses were commissioned by the Benjamin F. Ferguson Monument Fund , and are by Henry Hering : '' Defense '' depicts Ensign George Ronan in a scene from the 1812 Battle of Fort Dearborn ; '' Regeneration '' depicts workers rebuilding Chicago after the Great Chicago Fire of 1871
Great Chicago Fire
Great Chicago Fire
DuSable Bridge