Public domain photos

The image shows two men sitting at a desk in front of a blackboard. On the desk there are papers, books, and other objects. To the left of the desk is a cupboard filled with books. In the background, there is a wall with a door and a light hanging from the ceiling.

The image shows two men sitting at a desk in front of a blackboard. On the desk there are papers, books, and other objects. To the left of the desk is a cupboard filled with books. In the background, there is a wall with a door and a light hanging from the ceiling.Open in library