Public domain photos

The image shows an old book with a drawing of a plan of a building on it. The paper has text and a drawing on it, and there is a watermark at the bottom of the image. The building appears to be a plan, with various rooms and corridors labeled.

The image shows an old book with a drawing of a plan of a building on it. The paper has text and a drawing on it, and there is a watermark at the bottom of the image. The building appears to be a plan, with various rooms and corridors labeled.Open in library