Rubuta ci gaba don wannan sakin layi - A cikin shekarun da suka gabata bayan yakin basasa, St. Louis ya girma ya zama birni na huɗu mafi girma a ƙasar, bayan Birnin New York, Philadelphia, da Chicago. Har ila yau, ya sami ci gaba mai saurin ci gaba da sufuri da kuma ci gaban masana'antu. Wannan lokacin ya ƙare a 1904 World's Fair
da wasannin Olympics na 1904, wanda aka gudanar a lokaci guda a St. Louis.