Symbolism

Caesar Ripa's  ICONOLOGIA transcribed by Rawn Clark on Adam McLean's Alchemy website.
http://www.levity.com/alchemy/iconolog.html

The Web Gallery contains over 8,500 digital reproductions of European paintings
and sculptures created between the years 1150 and 1800.
http://www.wga.hu/index.html

Edmund Burke (1729-1797) : A Philosophical Inquiry into the Origin
of Our Ideas of The Sublime and Beautiful (Bartleby.com - complete text)