rome's first written law was known as
The first written law code in Rome was called the Law of the Twelve Tables.he oldest extant law code that â¦ has been found is the law code of Ur-Nammu which dates to around 2100BC (Hammurabi's law code only dates to around 1790BC). The form of the laws follow the if...then... format that is followed in subsequent law codes-such as Hammurabi's.