More on Marforio from Infoplease:

• Marforio - Marforio A pasquinade (q.v.). Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894 ...
• Pasquinade - Pasquinade (3 syl.). A lampoon or political squib, having ridicule for its object; so called from ...
• Dictionary of Phrase and Fable: M - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "M"