Giovanni Benedetto Castiglione (1609 – 1664) was an Italian Baroque artist, painter, printmaker and draftsman, of the Genoese school. He is best known now for his elaborate engravings, and as the inventor of the printmaking technique of monotyping. Castiglione painted portraits, historical pieces and landscapes, but chiefly excelled in fairs, markets and rural scenes with animals. Castiglione was a brilliant draftsman and pioneered the development of the oil sketch (often using a mixture of mediums) as a finished work - previously they had been used only for working studies for another finished piece, for example by Rubens. He returned to the same subjects over and over again, but with significantly different compositions each time. He also executed a number of etchings.