1982 Fallingwater 20c Black and Brown

1982 Fallingwater 20c
1982 Illinois Tech, Fallingwater, Dulles, and Gropius House 20c

These stamps display the Illinois Institute of Technology by Mies van der Rohe, Fallingwater by Frank Lloyd Wright, Dulles International Airport by Eero Saarimen, and Gropius house by Walter Gropius. They are part of the American Architecture series.