Model Study of a Seated Nude Man with a Cloak over his Head, Andrea Sacchi, c. 1630
It was not until painting academies were established in the 17th century that drawing after nude male models became an integral part of artistic training. In this sheet Sacchi carefully studied the working of muscles. This was good practise for the artist and he also could use this figure in a mythological or historical representation, for example as Hercules or the god Jupiter.