The Explosion of the Spanish Flagship during the Battle of Gibraltar (ca. 1621)

The Art of Hidden Faces: Anthropomorphic Landscapes

Self-Portrait by Ernst Mach (1886)

The Friendship Book of Anne Wagner (1795-1834)

Phenomena Over and Under the Earth (1878)

Anatomical Illustrations from 15th-century England

The Key of Hell: an 18th-Century Manual on Black Magic

Harry Kellar’s Show Posters

Watercolours from a 16th-Century De Materia Medica

19th-Century Album of Ottoman Fashion

Chart of the Inner Landscape (1886)

Transference of Thoughts (1885)

Compendium Of Demonology and Magic (ca. 1775)

The Art of Dreams

Illustrations from a Teenage Holiday Journal (1821)

A Young Daughter of the Picts (ca. 1585)

Flowers of the Sky

The Tibetan Book of Proportions

Selection from Wellcome Library’s release of 100k openly licensed images

Edward Lear’s Walk on a Windy Day (1860)

Paintings in Proust (Vol. 1, Swann’s Way)

The Sketchbooks of Jacques-Louis David

A Selection from The Getty’s Open Content Program

The Heart in Art