Alchemical emblematic imagery.

Adam McLean's Art Gallery of hand-coloured alchemical images [over 800 items]
Alchemy Emblems project
Alchemical symbolism
Searchable database of alchemical emblems [500 + images]
Database of alchemical iconography
Images from alchemical manuscripts
Emblematic material related to alchemy
Astronomical/astrological emblematic material related to alchemy
Emblematic Art site - prints and paintings
Adam McLean's Art Weblog