He was an artist who specialised in repeating patterns and optical illusions.
Art
He was an artist basically who did prints and woodcuts he usually only used black and white.
Escher was a famous painter and drawer, especially noted for the strange dimensions, merged images and optical illusions in his many pieces. His most recognised work is probably 'Relativity'.
Each Piece of Escher's work has it's own meaning, but overall where most artists tried for beauty, Escher tried for wonder
He was an artist.