Less well known, at least outside Chicago, are Keck & Keck, who created space-age houses for the 1933 World's Fair in Chicago, but whose later work can be seen as a "warm modernism." This approach is for the most part what many of today's architects in the area embrace: simple forms and geometries a la Mies balanced by warm materials and horizontal lines a la Wright. Obviously, there's a lot more to them than these formal characteristics, but in Chicago, regional design incorporates historical figures, not just climate, materials, and other factors of place.