This document provides an overview of the Dutch artist M.C. Escher and his work with tessellations. It defines tessellations as arrangements of shapes that cover an area without overlaps through repetition and pattern. While tessellations have existed for centuries, Escher was a modern artist in the early 1900s who incorporated them into his abstract and expressionistic artworks, finding inspiration in mathematics. Some of his most famous works that used tessellations include Lions from 1925 and Regular Division of the Plane with Birds from 1949.