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Worship in Rome and Italy

The Romans celebrated her festival from March 19 to March 23 during the day that is called, in the neuter plural, Quinquatria, the fifth day after the Ides of March, the nineteenth, an artisans ' holiday. This festival was of deepest importance to artists and craftsmen as she was the patron goddess of crafting and arts. According to Ovid (Fasti 3.809) the festival was 5 days long, and the first day was said to be the anniversary of Minerva's birth, so no blood was to be shed. The following four days were full of games of "drawn swords" in honour of Minerva's military association. Suetonius tells us (Life of Domitian 4.4) that Domitian celebrated the Quinquatria by appointing a college of priests who were to stage plays and animal games in addition to poetry and oratory competitions. A lesser version, the Minusculae Quinquatria, was held on the Ides of June, June 13, by the flute-players, as Minerva was thought to have invented the flute. In 207 BC, a guild of poets and actors was formed to meet and make votive offerings at the temple of Minerva on the Aventine Hill. Among others, its members included Livius Andronicus. The Aventine sanctuary of Minerva continued to be an important center of the arts for much of the middle Roman Republic.

As Minerva Medica, she was the goddess of medicine and physicians. As Minerva Achaea, she was worshipped at Lucera in Apulia where votive gifts and arms said to be those of Diomedes were preserved in her temple.

According to the Acta Arvalia, a cow was sacrificed to Minerva on October 13 58 AD along with many other sacrifices to celebrate the anniversary of Nero coming to power. On January 3 81 AD, as a part of the New Year vows, two cows were sacrificed to Minerva (among many others) to secure the well-being of the emperor Titus, Domitian Caesar, Julia Augusta, and their children. On January 3 87 AD there is again record of a cow being sacrificed to Minerva among the many sacrifices made as a part of the New Year vows.

In Fasti III, Ovid called her the "goddess of a thousand works" due to all of the things she was associated with. Minerva was worshipped throughout Italy, and when she eventually became equated with the Greek goddess Athena, she also became a goddess of battle. Unlike Mars, god of war, she was sometimes portrayed with sword lowered, in sympathy for the recent dead, rather than raised in triumph and battle lust. In Rome her bellicose nature was emphasized less than elsewhere.

According to Livy 's History of Rome (7.3), the annual nail marking the year, a process where the praetor maximus drove a nail in to formally keep track of the current year, happened in the temple of Minerva because she was thought to have invented numbers.

There is archaeological evidence to suggest that Minerva was worshipped not only in a formal civic fashion, but also by individuals on a more personal level.