The gens Cassia was a Roman family of great antiquity. The earliest members of this gens appearing in history may have been patrician, but all those appearing in later times were plebeians. The first of the Cassii to obtain the consulship was Spurius Cassius Vecellinus, in 502 BC. He proposed the first agrarian law, for which he was charged with aspiring to make himself king, and put to death by the patrician nobility. The Cassii were amongst the most prominent families of the later Republic, and they frequently held high office, lasting well into imperial times. Among their namesakes are the Via Cassia, the road to Arretium, and the village of Cassianum Hirpinum, originally an estate belonging to one of this family in the country of the Hirpini. Their most famous member is Gaius Cassius Longinus, an assassin of Julius Caesar alongside Brutus. Origin A possible clue to the origin of the Cassii is the cognomen Viscellinus or Vecellinus, borne by the first of this gens to appear in history. It appears to be derived from the town of Viscellium or Vescellium, a settlement of the Hirpini, which is mentioned by Titus Livius in connection with the Second Punic War. The town was one of three captured by the praetor Marcus Valerius Laevinus after they had revolted in 215 BC. Its inhabitants, the Viscellani, are also mentioned by Pliny the Elder. This suggests the possibility that the ancestors of the Cassii were from Hirpinum, or had some other connection with Viscellium. The existence of a substantial estate of the Cassii in Hirpinum at a later time further supports such a connection. Spurius Cassius Vecellinus, thrice consul at the beginning of the Republic, has traditionally been regarded as a patrician, in part because all of the consuls before 366 BC were supposed to have been patricians. The previous year saw the passage of the lex Licinia Sextia, formally permitting the plebeians to stand for the consulship. However, scholars have long suspected that a number of consuls bearing traditionally plebeian names during the nearly century and a half before this law were in fact plebeians, and that the original intent of the lex Licinia Sextia was not to open the consulship to the plebeians, but to require the election of a plebeian consul each year, although this was not permanently achieved for a number of years after its passage. Viscellinus may thus