John Nelson Shanks (December 23, 1937 – August 28, 2015) was an American artist and painter. His best known work is probably his portrait of Diana, Princess of Wales, completed in 1996. The painting was first shown at Hirschl & Adler Gallery in New York City, April 24 to June 28, 1996.Shanks had been on the faculty of the Memphis Academy of Arts, the Art Institute of Chicago, the Art Students League of New York, the National Academy of Design and Studio Incamminati and was a resident of Andalusia, Pennsylvania. He was an honorary member of the American Society of Classical Realism Guild of Artists.Shanks was a painter, teacher and art historian influential in the revival of classical realism in the United States. His portraits of royalty, politicians and celebrities added to his international profile as one of the foremost contemporary figurative painters. Shanks' philosophies and skills were shared through his teaching at various public and private institutions. In 2002, he founded Studio Incamminati in Philadelphia, Pennsylvania; an academy dedicated to the study, practice and spread of realist art using the philosophy and techniques espoused by Shanks.