Felicitas continued to play an important role in Imperial cult, and was frequently portrayed on coins as a symbol of the wealth and prosperity of the Roman Empire.
Felicitas was at issue when the suovetaurilia sacrifice conducted by Cato the Elder as censor in 184 BC was challenged as having been unproductive, perhaps for vitium, ritual error.
[10] In the following three years Rome had been plagued by a number of ill omens and prodigies (prodigia), such as severe storms, pestilence, and "showers of blood," which had required a series of expiations (supplicationes).
[12] Cato says that a lustrum should be found to have produced felicitas "if the crops had filled up the storehouses if the vintage had been abundant if the olive oil had flowed deliberately from the groves",[13] regardless of whatever else might have occurred.
Felicitas was simultaneously a divine gift, a quality that resided within an individual, and a contagious capacity for generating productive conditions outside oneself:[15] it was a form of "charismatic authority".
[23] The temple was located in the Velabrum in the Vicus Tuscus of the Campus Martius, along a route associated with triumphs: the axle of Julius Caesar's triumphal chariot in 46 BC is supposed to have broken in front of it.
His domination as dictator resulted from civil war and unprecedented military violence within the city of Rome itself, but he legitimated his authority by claiming that the mere fact of his victory was proof he was felix and enjoyed the divine favor of the gods.
Republican precedent was to regard a victory as belonging to the Roman people as a whole, as represented by the triumphal procession at which the honored general submitted public offerings at the Temple of Jupiter Optimus Maximus at the Capitol, and Sulla thus established an important theological element for the later authority of the emperor.
[43] Felicitas was a watchword used by Julius Caesar's troops at the Battle of Thapsus,[44] the names of deities and divine personifications being often recorded for this purpose in the late Republic.
[48] A calendar from Cumae records that a supplicatio was celebrated on April 16 for the Felicitas of the Empire, in honor of the day Augustus was first acclaimed imperator.
[51] Felicitas Temporum ("Prosperity of the Times"), reflecting a Golden Age ideology, was among the innovative virtues that began to appear during the reigns of Trajan and Antoninus Pius.
[55] Felicitas Perpetua Saeculi ("Perpetual Blessedness of the Age") appears on a coin issued under Constantine, the first emperor to convert to Christianity.
The concept, which constituted the foundation of the imperial Roman propaganda, legitimized power or a claimant's right to rule through victory in the absence of traditional institutions.