tessellations : is a shapes that fit together without overlapping and gaps and can repeat forever
mc escher was the first person to connect tessellations with maths he found the tessellations in a cathedral well he was visiting spain he found them fascinating however he didn't create tessellations they were alive for millions of years before him he only made more math with them believe it or not mc escher was never too smart
here are some examples of tessellations:
mine eschers