translate English to French: You can wander into lesser known churches like Sant'Ivo and Sta Maria in Trastevere wearing shorts, sleeveless shirts, or pretty much anything without problems. It is, however, good to keep one's dress tasteful, as these are still churches and houses of prayer for many people.
Il est possible de demander une sorte de Chantilly qui n'en est pas, cela s'appelle la "panna".