Black and white photo of a large building with a clock tower

Black and white drawing of the Arch of Titus in Rome

White background with a circle in the center containing a blue and…

Diagram of a ray with a point at the center and a line at the end of it

Drawing of a goat on a piece of paper with text written on it

Tunnel with a green and yellow pattern on it

Painting of a man in a red robe

Drawing of a boat on a piece of paper with some text written on it

Chinese calligraphy scroll with Chinese characters written on it