What type of illusions did M.C. Escher make?

M.C. Escher was a Dutch artist who is known for his mathematically inspired woodcuts, lithographs, and mezzotints. His works often featured impossible objects, optical illusions, and tessellations. Some of his most famous works include "Relativity", "Ascending and Descending", and "Waterfall". Escher's works have been exhibited in museums around the world and have been praised for their beauty and mathematical complexity.