Lucius Tarquinius Superbus in the context of "Lucretia"

The overthrow of the Roman monarchy was an event in ancient Rome that took place between the 6th and 5th centuries BC where a political revolution replaced the then-existing Roman monarchy under Lucius Tarquinius Superbus with a republic. The details of the event were largely forgotten by the Romans a few centuries later; later Roman historians presented a narrative of the events, traditionally dated to c. 509 BC, but it is largely believed by modern scholars to be fictitious.

The traditional account portrays a dynastic struggle in which the king's second son, Sextus Tarquinius, rapes a noblewoman, Lucretia. Upon revealing the assault to some Roman noblemen, she kills herself. The Roman noblemen, led by Lucius Junius Brutus, obtain the support of the Roman aristocracy and the people to expel the king and his family and create a republic. The Roman army, supporting Brutus, forces the king into exile. Despite a number of attempts by Lucius Tarquinius Superbus to reinstate the monarchy, the Roman people are successful in establishing a republic and thereafter elected two consuls annually to rule the city.

The Roman Senate (Latin: Senātus Rōmānus) was the highest and constituting assembly of ancient Rome and its aristocracy. With different powers throughout its existence, it lasted from the first days of the city of Rome (traditionally founded in 753 BC) as the Senate of the Roman Kingdom, to the Senate of the Roman Republic and Senate of the Roman Empire and eventually the Byzantine Senate of the Eastern Roman Empire, existing well into the post-classical era and Middle Ages.

During the days of the Roman Kingdom, the Senate was generally little more than an advisory council to the king. However, as Rome was an electoral monarchy, the Senate also elected new Roman kings. The last king of Rome, Lucius Tarquinius Superbus, was overthrown following a coup d'état led by Lucius Junius Brutus, who founded the Roman Republic. During the early Republic, the Senate was politically weak, while the various executive Roman magistrates who appointed the senators for life (or until expulsion by Roman censors) were quite powerful. Since the transition from monarchy to constitutional rule was most likely gradual, it took several generations before the Senate was able to assert itself over the executive magistrates. By the middle Republic, the Senate had reached the apex of its republican power. The late Republic saw a decline in the Senate's power, which began following the reforms of the tribunes Tiberius and Gaius Gracchus. After the transition of the Republic into the Principate, the Senate lost much of its political power as well as its prestige.

Sextus Tarquinius was one of the sons of the last king of Rome, Lucius Tarquinius Superbus. In the original account of the Tarquin dynasty presented by Fabius Pictor, he is the second son, between Titus and Arruns. However, according to Livy and Dionysius of Halicarnassus, he was either the third or first son, respectively. According to Roman tradition, his rape of Lucretia was the precipitating event in the overthrow of the monarchy and the establishment of the Roman Republic.

Lucius Junius Brutus (died c. 500 BC) was the semi-legendary founder of the Roman Republic and traditionally one of its two first consuls. Depicted as responsible for the expulsion of his uncle, the Roman king Tarquinius Superbus after the rape and suicide of Lucretia, in the traditional accounts it is he who led the overthrow of the Roman monarchy. He was then involved in securing the abdication of fellow consul Tarquinius Collatinus, and the suppression of a plot to restore the Tarquinian monarchy.

He was claimed as an ancestor of the Roman gens Junia, including Decimus Junius Brutus and Marcus Junius Brutus, the most infamous of Julius Caesar's assassins. Traditions about his life may have been fictional, and some scholars argue that it was the Etruscan king Porsenna who overthrew Tarquinius. The plebeian status of the Junia gens has also raised doubts about his position as a consul and the alleged initial patrician domination of the office. Depicted as the nephew of Tarquinius, he may have symbolized the internal tensions that occurred during the transition between the monarchy and the republic.

The gens Tarquinia was a plebeian family at ancient Rome, usually associated with Lucius Tarquinius Priscus and Lucius Tarquinius Superbus, the fifth and seventh Kings of Rome. Most of the Tarquinii who appear in history are connected in some way with this dynasty, but a few appear during the later Republic, and others from inscriptions, some dating as late as the fourth century AD.

Titus Tarquinius was one of the sons of the last king of Rome, Lucius Tarquinius Superbus. According to Livy and fragments of the first Roman historian, Fabius Pictor, he was the eldest son; however, Dionysius of Halicarnassus claims he was not.

Dionysius claims that each of the brothers were regents of different towns: Titus was regent of Signia. In spite of their duties, Livy and Dionysius record that Titus and his younger brother Arruns, along with his cousin Lucius Junius Brutus travelled to consult the Delphic oracle to have an omen witnessed by the king interpreted.