A comprehensive, hand-illustrated botanical work consisting of 3,240 folio-sized, coloured copper-plate engravings of wild plants found in Denmark and neighboring Scandinavian countries (1833).
The data set is extracted from The Royal Danish Library digital collection of portraits here http://www5.kb.dk/images/billed/2010/okt/billeder/subject5695/en, and then transformed for use in neural network face recognition.