Two pieces of paper with Chinese calligraphy written on them

3D model of a peptide molecule in black

Diagram of a Chinese building with Chinese characters on it

Black and white drawing of a pentagon with a star in the middle

Black and white photo of a narrow street with a number of buildings on…

Drawing of a child flying a kite in the sky

Black and white drawing of a man and woman standing in front of a…

Painting of two trees in the snow

Old black and white map of the city of London from 1897