, 2008. Fibreglass stone and airplane. National Gallery of Canada, Ottawa. Purchased 2011. Photo © Roman März](/images/content/menuSeeGallery.png)
Benjamin West
The Death of General Wolfe (Detail), 1770
oil on canvas
152.6 x 214.5 cm
Transfer from the Canadian War Memorials, 1921 (Gift of the 2nd Duke of Westminster, England, 1918)
National Gallery of Canada (no. 8007)
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Ascending and Descending, March 1960
M.C. Escher
Dutch, 1898
- 1972
lithograph on wove paper
46.1 x 39.2 cm; image: 35 x 28.5 cm
Gift of George Escher, Mahone Bay, Nova Scotia, 1983
National Gallery of Canada (no. 28455)
© Cordon Art B.V. - Baarn - Netherlands. Used by Permission. All rights reserved.
This structure is based on "impossible staircase" devised by the famed twentieth-century psychiatrist, geneticist, mathematician, and chess theorist Lionel Penrose. Escher formulated the structure so that one line of monks is continually descending the stairs while the other line is always ascending; they follow each other in a never-ending spiral that never reaches any destination.
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Circle Limit IV (Heaven and Hell)
Eight Heads
Tetrahedral Planetoid
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