History of the Latin language, The development of Roman law, Major codifications, Latin in European culture, Latin as the language of European ius comune, Latin in modern legal languages, Communication value of legal Latin, Major legal languages, Legal Latin, Legal German, Legal French, Legal English, Roman kingdom, The city's founding - dated to 753 BC with settlements along the river Tiber in central Italy, The transition from the kings to the Republic in about 509 BC.