The constitution of the Roman Republic was a set of uncodified norms and customs which, together with various written laws, guided the procedural governance of the Roman Republic. The constitution emerged from that of the Roman kingdom, evolved substantively and significantly—almost to the point of unrecognisability—over the almost five hundred years of the republic. The collapse of republican government and norms from 133 BC would lead to the rise of Augustus and his principate. The republican constitution can be divided into three main branches: