This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Professor Franciscus van Schooten door Philips Koninck . nl Professor Franciscus van Schooten door Philips Koninck th century painting found online at fransvanschooten nl htm fransvanschooten nl which ore or less mentions Christie's New York as source Philips Koninck other versions PDold Frans van Schooten Uploaded with Uploaded