This painter’s studio was located in the Town Hall of Haarlem. All manner of studio attributes are shown: drawings of nude models, a painted nocturnal land-scape and some plaster casts. A small oil sketch of a goat, a set of deer antlers and a horseshoe indicate that Van Os was mainly an animal painter. A young pupil kneels before the monumental 17th-century fireplace and looks through a portfolio of sketches.