During his life, Escher made 448 lithographs, woodcuts and wood engravings. He did over 2000 drawings and sketches. He also illustrated books, designed tapestries, postage stamps and murals. Escher was interested in different ways of making art, he used tile-like repeated patterns in many of his paintings. Early in his career he drew inspirations of nature: he studied art, landscapes and insects. Some of Escher’s most famous drawings include: "Drawing hands", "Relativity" and "Flying Fish". Most of his works were related to maths.