Chinese painting of a mountain scene with a house in the foreground

Molecular model of a peptide molecule on a white background

Drawing of three butterflies and a caterpillar on a white background

Black and white illustration of an angel and a woman standing in a…

Flag of the Democratic Republic of the Congo

Black and white engraving of a castle with a tower

Open book with a drawing of a plant with green leaves and yellow flowers

Painting of a woman in a blue dress standing against a white background

Black and white drawing of a man and a woman standing side by side