Roman law was in force throughout the empire, and Roman citizenship offered valuable rights and immunities.
وَخَافَ قَائِدُ ٱلْجُنْدِ لَمَّا تَحَقَّقَ أَنَّهُ رُومَانِيٌّ وَقَدْ قَيَّدَهُ » .‏ —‏ اع ٢٢ :‏ ​ ٢٥ -‏ ٢٩‏ .‏