American mid-century columns

1. A drawing of the main room of the Johnson Wax Building (1936, additions 1951) in Wisconsin, USA. Building
   by Frank Lloyd Wright (1867 - 1959), drawing by Hugh Ferriss (1889 – 1962, author of the book, Metropolis
   of Tomorrow (1929), artist and architect).
2. Oral Roberts University in Tulsa, Oklahoma USA by Frank Wallace, 1963
3. Conservatory of Music of the Oberlin College, Ohio, USA. Photo by Minoru Yamasaki, 1963