"There was some dispute over what killed vaudeville. Some said talking movies. Others said radio. A few cruel critics said it committed suicide. But all agreed that with the fall of its last fortress, the Palace Theater, it was dead... Last week, the corpse that wouldn't die got up and went home. Sol A. Schwartz, vice president of the Radio-Keith-Orpheum chain (RKO) announced restoration of vaudeville at the Palace, beginning May 18 ."
You can read about Chicago Vaudeville here