The Magna Carta, sealed under oath by King John at Runnymede, England in 1215, became part of English law, and subsequently adopted into Australian law.
To see the contents of a deceased person’s will can be difficult if you are not the executor. But in some states if you know who has the will, a copy, or other testamentary document, the law requires them to allow people who are entitled to have access, to inspect or see the will; and have a copy of it. Copying is at their own expense, but costs must be reasonable.
The Law of the Twelve Tables, which contained rules on inheritance, was a code formulated to appease class conflict in the largely agrarian society in Rome in 450 BCE. The Twelve Tables formed the basis of Roman Law.