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'''M. C. Escher''' (Maurits Cornelis Escher) (1898-1971) was a [[Dutch]] graphic artist. His work consisted mostly of prints: lithographs, woodcuts, and wood engravings. His work has connections with mathematical themes. Many of them are based on [[tessellation]]s.  

'''M. C. Escher''' (Maurits Cornelis Escher) (1898-1971) was a [[Dutch]] graphic artist. His work consisted mostly of prints: lithographs, woodcuts, and wood engravings. His work has connections with mathematical themes. Many of them are based on [[tessellation]]s. One of his best known works is "Relativity", which displays several staircases with inhabitants walking each way on them: gravity pulls some inhabitants in different directions than others.

His transformation pictures feature regular, repeating patterns of objects which change and transform, row by row or column by column. For example, in ''Sky and Water,'' rows of birds start out as realistic and detailed. In successive rows, the birds become less realistic, more stylized, and more vague, and gradually transform themselves into empty spaces between rows of fish at the bottom of the page. Meanwhile, the empty spaces between the birds gradually become more and more fish-shaped and transform themselves into solid fish.

His transformation pictures feature regular, repeating patterns of objects which change and transform, row by row or column by column. For example, in ''Sky and Water,'' rows of birds start out as realistic and detailed. In successive rows, the birds become less realistic, more stylized, and more vague, and gradually transform themselves into empty spaces between rows of fish at the bottom of the page. Meanwhile, the empty spaces between the birds gradually become more and more fish-shaped and transform themselves into solid fish.