 As a result of industrialization , the population became more concentrated into urban areas . By 1900 , the Twin Cities were becoming a center of commerce , led by the Minneapolis Grain Exchange and the foundation of the Federal Reserve Bank with its ninth district in Minneapolis . Many of the businessmen who had made money in the railroad , flour milling , and logging industries lived in the Twin Cities and personified the gilded age . They started to donate money for cultural institutions such as the Minneapolis Symphony Orchestra ( now the Minnesota Orchestra ) . The parks of Minneapolis , under the direction of Theodore Wirth became famous , and the new Minnesota State Capitol building and the Cathedral of Saint Paul attracted attention to Saint Paul . 
