Flaccus was a patrician and son of the Publius Valerius Flaccus who was consul in 227 BC with M. Atilius Regulus. His brother was the flamen dialisGaius Valerius Flaccus, who made a respectable political career as praetor, though not consul.
Career
The patrician Flaccus became a friend, political patron, and ally of the young plebeian senator Marcus Porcius Cato, later called Cato the Elder, during the earlier years of the Second Punic War. Flaccus is possibly the Valerius Flaccus who was a military tribune in 212 BC, serving under the consuls who captured Hanno's camp at Beneventum. Flaccus was curule aedile in 201 BC. He was probably the L. Valerius Flaccus who was a legate under the praetor L. Furius Purpureo in Gaul in 200. As praetor in 199, he was assigned to the province of Sicily. Flaccus received Italy as his province when he was consul in 195 BC, and continued to wage war as proconsul the following year against the Gauls, with a victory over the Insubres at Mediolanum. In 191 Flaccus was a legate under M'. Acilius Glabrio in the war against the Aetolians and at the Battle of Thermopylae. In 190, Flaccus served on the three-man commission created to strengthen Placentia and Cremona. His fellow commissioners were M. Atilius Serranus and L. Valerius Tappo. The following year, the commission founded Bononia as a Roman colony. In a "hotly contested" election, Flaccus became censor along with Cato in 184. Their censorship was noted for its severity: L. Quinctius Flamininus, the consul of 192, was kicked out of the senate; Scipio Asiaticus, the consul of 190, lost his equestrian rank; and public contracts were leased stringently. The two men shared common conservative political sympathies and cultural outlook, and were loyal to the military and political views of the older generation represented by Quintus Fabius Maximus Verrucosus. Both he and Cato sought to defend Roman tradition against Hellenism. Flaccus was a member of the College of Pontiffs from 196, when he succeeded M. Cornelius Cethegus, until his death. Flaccus became princeps senatus when Scipio Africanus Major died in 183. He himself died three years later.
