http://m.imgur.com/aaagGzJ I know it's Florence on the left and I think Austria on the right? I've never seen them together. Florence was on the same wall as well.
Seems to be the coat of arms of the House of Hapsburg-Lorraine - the dynasty which held the Grand Duchy of Tuscany from 1737 onwards after having succeeded to the last of the Medici, Gian Gastone (what a character!).
As a related piece of trivia... their rule ceased in 1859, with the Italian unification.
/r/heraldry would probably be where you'd ask this question, not here