This original postcard is from the 1933 Century Of Progress (Chicago World's Fair) which was held in Chicago. It is in excellent condition and the front features the "The Adler Planetarium". The reverse side features a postcard format, which is unused and a paragraph that says "The only Planetarium in America. An imposing permanent edifice, now a part of the World's Fair. Inside a heavenful of drama as old as the Earth itself unfolds to the visitors. The firmament passes in review as they sit beneath an artificial sky & see the sun, moon, planets and stars move across the dome." and measures approx. 5 1/2" x 3 1/2".