Book with a drawing of a yellow oak tree branch with leaves and an…

Molecular model of a peptide molecule in black

Painting of a wooded landscape with trees

In this image we can see a painting of a person lying on the surface

Black and white photo of a man with a mustache wearing a white dress

Black and white drawing of a man and a woman standing next to each other

Black and white engraving of a landscape with a man and a woman in the…

Drawing of a tree with pink flowers on it against a white background

Wooded landscape with figures on horseback in the foreground