Running, but wanted to get you the skinny for your weekend plans: nosy around gorgeous Italian places usually closed to the public.
FAI-Fondo Ambiente Italiano is a non-profit organization set up twenty years ago to preserve and open to the public not just historic places and monuments (the first things, frankly, that come to my mind), but also precious territories, such as wetlands and special gardens.
Will you be in Italy this weekend, and have some time on your hands? Here's the regional map (only in Italian, sorry folks!) of what will be open and where: http://www.giornatafai.it/Elenco-luoghi-aperti-2012.htm.
Hey, why not become a member, too? It's about the same price as a "Friends" membership for your local museum.
P.S., Italy "springs forward" to daylight savings time this weekend.