The Accademia is Venice's foremost art museum, and probably the best in Italy, or, at any rate, the one I enjoyed the most. It's got a great collection focused primarily on Venetian artists, although it's a bit of a shame since most of the art was ripped out of the city's churches, where it probably would have looked nicer. The museum actually expanded into a nearby church, which makes for a nice place to display the collection.