The tribunes of the people finally gained more power, and a resolution was introduced in the senate providing that a body of ten men should be selected to reduce the laws of the state to a written code. In 451 B.C. the ten men were chosen {255} from the patricians, who formed ten tables of laws, had them engraved on copper plates, and placed them where everybody could read them. The following year ten men were again appointed, three of whom were plebeians, who added two more tables; the whole body became known as the Laws of the Twelve Tables. It was a great step in advance when the laws of a community could be thus published. Soon after this the laws of Valerius and Horatius made the acts of the assembly of the tribunes of equal force with those of the assembly of the centuries, and established that every magistrate, including the dictator, was obliged in the future to allow appeals from his decision. They also recognized the inviolability of the tribunes of the people and of the aediles who represented them. But in order to circumvent the plebeians, two quaestors were appointed in charge of the military treasury. Indeed, at every step forward which the people made for equality and justice, the senate, representing the aristocracy, passed laws to circumvent the plebeians. In 445 B.C. the tribune Canuleius introduced a law legalizing marriage between the patricians and plebeians. The children were to inherit the rank of their father. This tribune further attempted to pass a law allowing consuls to be chosen from the plebeians. To this a fierce opposition sprang up, and a compromise measure was adopted which allowed military tribunes to be elected from the plebeians, who had consular power. But again the senate sought to circumvent the plebeians, and created the new patrician office of censor, to take the census, make lists of citizens and taxes, appoint senators, prepare the publication of the budget, manage the state property, farm out the taxes, and superintend public buildings; also he might supervise the public morality. With the year 587 B.C. came the invasion of the Gauls from the north and the famous battle of the Allia, in which the Romans suffered defeat and were forced to the right bank of the Tiber, leaving the city of Rome defenseless. Abandoned by the citizens, the city was taken, plundered, and burned by {256} the Gauls. Senators were slaughtered, though the capitol was not taken. Finally, surprised and overcome by a contingent of the Roman army, the enemy was forced to retire and the inhabitants again returned. But no sooner had they returned than the peaceful struggle of the plebeians against the patricians began again.