Kasia Pisarek (Poland/UK), an independent art historian and research specialist on attributions, took an MA Sorbonne and a PhD at the University of Warsaw. Her doctoral dissertation “Rubens and Connoisseurship ~ On the problems of attribution and rediscovery”, identified many recently fallen Rubens attributions. She will set out a number of interlocking aesthetic, art historical and technical arguments against the recently claimed attribution to Leonardo of the drawing “La Bella Principessa”, which work appeared anonymously and without provenance in New York in 1998. Her findings were published in the June 2015 Artibus et Historiae.