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Penrose triangle (245 words) |
 | In 1954, Roger Penrose, after attending a lecture by the artist M. Escher, rediscovered the impossible triangle and drew it in its most familiar form, which he published in a 1958 article in the British Journal of Psychology, coauthored with his father Lionel. |
| Penrose was also unfamiliar with the work of Reutersvärd, Piranesi, and others who had created impossible figures previously. |
| Penrose's impossible triangle, unlike Reutersvärd's earlier version, was drawn in perspective, which added an additional size paradox to the object. |
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