Following recent archaeological discoveries, the very first art subject was not a human but a warty pig, and soon after followed cave paintings of humans hunting pigs. Thus, the portrayal of humans in artworks, later followed by objects and nature, really is as old as art itself. Before the invention of camera obscura and long before the selfie era, painters were entrusted with creating the most accurate depictions of people. Even today, one of the most famous paintings, painted over 500 years ago, Da Vinci's Mona Lisa, is deemed highly realistic even by today's portrait painting standards.