Numerous works by Dorothy in the Biedermann collection, including "Secret Green" (1985), "Red and Green" (1975), “Odyssey” (1987), and many more, are the focus of the major exhibition presented by MUSEUMART.PLUS in Donaueschingen, Germany.  The exhibition is entitled ‘colourful. farbenfroh’ and is on display from February 18, 2018 - January 20, 2019.