The year 509 BC was a year of the pre-Julian Roman calendar. In the Roman Empire it was known as the Year of the Consulship of Brutus and Collatinus (or, less frequently, year 245 Ab urbe condita). The denomination 509 BC for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
It is not surprising that Donald Trump holds the law in contempt. That is what happens when you have a criminal as President... Under the kings (753-509 bc), they had no rights at all, but with the inception of the Republic, the real battle began ... .