Public domain photos

The image shows a piece of paper with a drawing of a triangle on it, which is believed to be Leonardo da Vinci's signature. The paper is yellowed with age and the drawing is intricate and detailed. The text on the paper is written in a neat and legible font.

The image shows a piece of paper with a drawing of a triangle on it, which is believed to be Leonardo da Vinci's signature. The paper is yellowed with age and the drawing is intricate and detailed. The text on the paper is written in a neat and legible font.Open in library