sentences:  The fifth in a line of major indoor venues built in Sioux City, it was designed by Knute E. Westerlind in 1938 and finally completed after many delays in 1950.In the building's original form, it was an arena that seated up to 3,500 people.In 2003, the building was replaced by the Tyson Events Center, built around the northeast corner of the Municipal Auditorium.