Although an important artist who used oil and explored its possibilities, has been incorrectly attributed as the inventor of the medium.

Although an important artist who used oil and explored its possibilities, Jan Van Eyck has been incorrectly attributed as the inventor of the medium.
Jan Van Eyck was the great artist of the early Netherlands school. He was considered revolutionary within his lifetime, his designs and methods are heavily copied and reproduced. He was the only netherlandish painter who sign his canvases.

Ibelieve it's the left middle finger