Hall of Science - Century of ProgressHall of Science Century of Progress Valdura wins again! All world's fair buildings painted both interior and exterior with Valdura products, W. L. Stensgaard & Associates, Inc. Paul Philippe Cret, published in 1934 as a color silkscreen at 76x40 cm. poster showing the Hall of Science building, by architect Paul Cret, at the 1934 Chicago World's Fair. Poster was used to promote the Valdura paint company.