Missouri's building, by H. H. Hohenschild of St. Louis, was a well-developed colonial design in "travertine", 64 by 123 feet. It had a deep portico of tall columns rising to the second story, dormers and an octagonal cupola with a flagstaff. Its reception room, 41 by 80 feet, had a small stage and galleries. The Official Guide says its hardwood dance floor was the second largest on the grounds and made it famous before the fair even opened. There were a library of Missouri authors, a kitchen and buffet, and apartments upstairs for the commissioners.
Missouri dedicated the building on March 13, 1915, with 68 hostesses. St. Louis Day was May 1 and Missouri Day May 3.
