We know due to the Acta Arvalia that a cow was sacrificed to Minerva on October 13 58 AD along with many other scrifices 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.