Staircase Group Encyclopedia of Greater Philadelphia

After Charles Willson Peale’s The Staircase Group emerged from a private collection in the mid-twentieth century, the Philadelphia Museum of Art placed the compelling trompe l’oeil (deceive the eye) double portrait on display and it became widely reproduced in American popular and art historical literature. Its contemporary popularity echoed the popularity it enjoyed at Peale’s ...…

Penrose Stairs - The Illusions Index

However, an impossible staircase was first created many years earlier, in 1937, by Oscar Reutersvärd - unbeknown to the Penroses and Escher. The Penrose Stairs is an impossible figure (or impossible object or undecidable figure): it depicts an object which could not possibly exist.…