Stathis Tsavalias, also known as Insane51 is an artist known for his intricate and ever-innovative spray painting that pushes the ideas of graffiti. His more popular works though, surrounds his usages of overlay murals.

Born in Greece in 1992, he began writing graffiti in 2007, Insane51 has also has formal education at the Athens School of Fine Arts and has also studied both applied and graphic art. His earlier works first focused upon using colour and form to experiment with different techniques, further into his career to now his specialisation wanders around the notions of photorealism, and overlaying images, Insane adds two images in both red and green and overlaps the two to create a three-dimensional illusionary effect.