A Mermaid

Painting by John William Waterhouse, completed in 1900,now in the collection of the Royal Academy of Arts.

Consulting the Oracle

Oil painting by John William Waterhouse, showing a priestess using a mummified head, a tephra, as an oracle.


Opaque watercolour in which the pigments are bound together by glue.

How They Met Themselves

Painting by Dante Gabriel Rossetti, in which a couple in medieval costume are confronted by their doubles.


Term applied to any paint in which the pigment is dissolved in water and mixed with an organic gum or glue.