This is a classic painting by Dutch artist Rembrandt van Rijn, depicting a famous anatomy lesson given by Dr. Nicolaes Tulp in 1632. The painting shows a group of Amsterdam's leading surgeons gathered around a corpse, with Dr. Tulp demonstrating
From Wikipedia
The Anatomy Lesson of Dr. Nicolaes Tulp is a 1632 oil painting on canvas by Rembrandt housed in the Mauritshuis museum in The Hague, Netherlands. It was originally created to be displayed by the Surgeons Guild in their meeting room. The painting is regarded as one of Rembrandt's early masterpieces.