Hans Burkhardt pastel entitled Abstract in purpleHans Burkhardt pastel entitled Abstract in purple From the collection of Dr. Aurelio de la Vega, the world renowned Cuban composer, conductor, and music professor, who taught at Cal State Northridge (CSUN) for over three decades, during which time he was Distinguished Professor of Music and Director of the Electronic Music Studio. This gorgeous pastel was acquired around the mid 1970's, by the present owner. It is unframed, and in very good condition.