Publius Postumius Tubertus, the son of Quintus, was the first of the patrician gens Postumia to obtain the consulship, which he held in 505 BC, and again in 503. Ten years later, he was one of the envoys sent by the Roman Senate to negotiate with the plebeians during the first secessio plebis. The outcome of those negotiations reunited the Roman people, and established the tribunes of the plebs, one of the most important institutions of the Roman Republic.[1]