Civis Romanus sum
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The Latin phrase cīvis Rōmānus sum (Classical Latin: [ˈkiːwis roːˈmaːnus ˈsũː]; "I am (a) Roman citizen") is a phrase used in Cicero's In Verrem as a plea for the legal rights of a Roman citizen. When travelling across the Roman Empire, safety was said to be guaranteed to anyone who declared, "civis Romanus sum".