Pietro D’Abano 

The dragon growing from the Philosopher’s tree -Hieronymous Reussner ~1582

Cathedral of Aachen, Germany Source: ancient-serpent

Astarte Syriaca by Dante Gabriel Rossetti Source: abystle

The Hermaphrodite from Amphitheatrum Sapientiae Aeternae, a book on alchemy by Heinrich Khunrath, 1595