Those were later period buildings. Look at photos of the Robie house in Chicago, typical of his early prairie period: https://en.wikipedia.org/wiki/Robie_Hous

Those were later period buildings. Look at photos of the Robie house in Chicago, typical of his early prairie period: https://en.wikipedia.org/wiki/Robie_House https://en.wikipedia.org/wiki/Robie_House https://www.google.com/search?q=Robie+House+interior https://www.google.com/search?q=Robie+House+interior The largest building of his prairie period was the Dana-Thomas house in Springfield, also worth seeing.