Battle of Lake Regillus in the context of "Tusculum"

Regillus was an ancient lake of Latium, Italy, famous in the legendary history of Rome as the lake near which the Battle of Lake Regillus took place in 496 B.C. between the Romans and the Latins which finally decided the hegemony of Rome in Latium. The lake, now drained, was near the present-day town of Frascati.

During the battle, so the story runs, the Roman dictator Postumius vowed to build a temple to the twin gods Castor and Pollux, who were specially venerated in Tusculum, the chief city of the Latins (it being a Roman custom to invoke the aid of the gods of the enemy). The pair duly appeared during the battle dressed in white armour riding white horses, helped the Romans to prevail, and afterwards took the news of the victory to Rome. There they watered their horses at the spring of Juturna, close to which their temple in the Forum was subsequently erected.

The Foedus Cassianum (/ˈfiːdəs ˌkæʃiˈeɪnəm/ in English) or the Treaty of Cassius was, according to Roman tradition, a treaty which between the Roman Republic and the Latin League in 493 BC after the Battle of Lake Regillus. It ended the war between the Latin League and Rome, placing Rome as equal in power to all of the members of the League combined.

The treaty was significant in serving as a model for later treaties between Rome and other Italic polities, outlining the terms of mutual assistance and equality of status within the defensive alliance .

Aulus Postumius Albus Regillensis was an ancient Roman who, according to Livy, was Roman dictator in 498 or 496 BC, when he conquered the Latins in the great Battle of Lake Regillus and subsequently celebrated a triumph. Many of the coins of the Postumii Albi commemorate this victory of their ancestor, as in the one pictured. Roman folklore related that Castor and Pollux were seen fighting in this battle on the side of the Romans, whence the dictator afterwards promised a temple to Castor and Pollux in the Roman Forum.

He was consul in 496 BC, in which year some of the annals, according to Livy, placed the battle of Lake Regillus; and it is to this year that Dionysius assigns it. The name "Regillensis" is usually supposed to have been derived from this battle; but Niebuhr thinks that it was taken from a place of residence, just as the Claudii bore the same name, and that the later annalists only spoke of Postumius as commander in consequence of the name. Livy states expressly that Scipio Africanus was the first Roman who obtained a surname from his conquests. In 495 BC, Postumius was chosen at short notice by the Romans to lead the cavalry to victory against a Sabine invading force. In 493 BC Postumius was one of the ten envoys sent by the senate to treat with the plebeian leaders during the first secessio plebis.

The Temple of Castor and Pollux (Italian: Tempio dei Dioscuri) was an ancient temple in the Roman Forum, Rome, Central Italy. It was originally built in gratitude for victory at the Battle of Lake Regillus (495 BC). Castor and Pollux (Greek Polydeuces) were the Dioscuri, the "twins" of Gemini, the twin sons of Zeus (Jupiter) and Leda. Their cult came to Rome from Greece via Magna Graecia and the Greek culture of Southern Italy.

The Roman temple is one of a number of known Dioscuri temples remaining from antiquity.