When Casanova is running away from the Inquisition in the opening scene he jumps through a window and into the University of Venice. The University of Venice never existed and the building he jumps into is in fact the "Teatro Olimpico", one of the first Renaissance theaters 140 kilometers away from Venice.
Some plot elements recall William Shakespeare play The Merchant of Venice, especially Francesca Bruni's disguising as a man in order to take part in a legal council. This movie also featured Jeremy Irons who appeared in The Merchant of Venice (2004).
While Francesca is fencing with a guard during the climatic escape sequence, Victoria is seen in the background dueling with another guard, but in the very next shot, she's just running up to engage him.