Decennalia

During the festival, he would surrender all of his authority to the hands of the people, who were filled with joy and, charmed with the goodness of Augustus, immediately delivered it back to him again.

[1] Roman coinage was specially modified during this time to indicate the undertaking of these vows, such as with the inscription VOTA SUSCEPTA DECENNALIA, or VOTIS X.

These vows must have been made at the beginning of every tenth year, since on the medal of Pertinax, who only reigned for 4 months in 193, there are the inscriptions VOTA DECENN.

[6] This was one of the first major monuments to be erected in the Roman Forum since the reign of Septimius Severus, which then ensued the celebration of the tenth anniversary of the Tetrarchy (the rule of four emperors), instituted by Diocletian around 293 CE to 313.

On this pedestal there are two chiseled winged victories who hold a shield on with an inscription that states CAESARUM DECENNALIA FELICITER, which translates to "Happy Tenth Anniversary of the Caesars."