In addition to its interest as a film that stars poor dead Heath Ledger, Casanova is notable as a total feminist fantasy. Not only does the proto-feminist radical author heroine find true love with a totally hot guy, but her mother does too (well, to be honest, the mother's true love is not traditonally hot - but the mom is into chunky guys, apparently.)
And to make it even better, it's got a great anti-Catholic theme going on - Jeremy Irons plays the bad guy, and has a great line - he promises a young woman she can have her virginity returned: "We're the Catholic Church - we can do that."