Anonymous ~ Skull, watercolour, pen, wash, pencil heightened with white gouache on paper, 19th century.

 

Anonymous ~ Erotica, lithograph c1930/40s

Unknown Artist ~ Dante's Inferno, etching, 18th Century.

Anon ~ The death of the god Phallus, ink, watercolor and gouache on paper, Japan, c1900.

Unknown Symbolist artist,oil on wood ca 20th century.

Medicina, anonymous cast. Personification of Medicine, bronze, Art Nouveau style c1900

The rose of Venus. Hand written by a devotee and illustrated by various unknown artists. Diosa Venus Immortal Reina del Universo. Tangier 1938

Anonymous...Erotica, Felix Lukkow engraver, 1875

A.N.G. ... Sunburst Peace Of Love , paint on cloth prison art

Anonymous... The Learned Man, 1511... Woodcut

from Liber de sensibus in Que hoc volumine continentur by Charles de Bovelles (Charles de Bouelles, Carolus Bovillus) (1479-1553) 

a  treatise on the senses. more HERE