Written down on the 12 tables
This started a hierarchy in the system
** The end of the 4th Century
Praetor Orbanos, local
Praetor Perigrinos, non-romans
The first permanent court
Added more courts
Early 2nd Century
Letting judges have the power of speak on behalf of the emperor
Formalized law school
Along side Emperor Valentinian III
Used the writing of the 5 important (dead jurists, as a kind of code to base cases off of)
A more complete version of what Emperor Theodosius had done.
It was called 'Corpus Iuris Civilis'