Jonathan David Katz is an American activist, art historian, educator and writer. He is currently Associate Professor of Practice in Art History and Gender, Sexuality & Women's Studies at the University of Pennsylvania. Katz is a founding figure in queer art history, responsible for the very first queer scholarship on a number of artists beginning in the early 1990s. His scholarship spans a period from the late 19th-century to the present, with an emphasis on the US, but with serious attention to Europe, Latin America and Asia as well. He has written extensively about gender, sexuality and desire, producing some of the key theoretical work in queer studies in the visual arts. Katz has curated more queer art exhibitions than anyone else in the world.