The name Babylon is derived from the Hebrew word Bābel, the Greek Babylon, the Akkadian Bab-ili: which would mean the door of the gods. In the city of Babylon around 2150 B.C. the rise of the Amoric blood dynasty begins. Babylon rises as an independent state on the territory of Akkad, and reaches its greatest power during Hamurabi. Under the rule of Hamurabi, the self-proclaimed "King of the Amorites," the city of Babylon became the center of legislation. It had a codex, the first known in history, carved into a granite stele. Obligatory law as one of the branches of law consisted of contracts which were enclosed in a clay envelope with the contents of the contract summarized. The mandatory legal contracts include: sale, lease, lease, personal lease, loan, pantry, warrant and company agreement (partnership). Property law, as part of Hamurabi's law, contains the most important property provisions, namely joint and private property. Other branches of law are family and marital, hereditary, criminal and legal proceedings.