Publius Valerius Publicola, a Roman lawgiver of the semi-historical period of the foundation of the republic. He is said to have been present when Lucretia stabbed herself, and to have borne a prominent part in the expulsion of the Tarquins. After the compulsory resignation of Collatinus he was elected consul in his place (about 509 B. C). In the war between the Tarquins and Veientes and the Romans, he gained a victory over the former. Returning to Rome, he began building a house on the Velian hill overlooking the forum, which excited a popular fear that he was seeking to raise himself to royal power. Valerius therefore ordered the building to be demolished, and his lictors when they appeared before the people to lower their fasces; whence he received the surname of Publicola or Poplicola, "the people's friend." He now brought forward laws for the establishment of the republic, one of which declared that whoever attempted to make himself king might be killed by any one; another, that plebeians condemned by a magistrate might appeal to the people.

He was afterward thrice elected consul; and the expedition of Porsena is placed during his time of office. "With T. Lucretius Tricipitinus, his colleague, he routed the Sa-bines and returned to Rome in triumph.