The Phrase "When in Rome, Do as the Romans Do"`

Did you know that the phrase "When in Rome, do as the Romans do" was coined by St. Ambrose of Milan when dialoging with St. Augustine, his spiritual follower. St. Augustine was asking him about a particular liturgical norm that differed in Milan (as opposed to Rome). Augustine asked his friend Ambrose what he should do, to which Ambrose replied with the famous saying.