A possible interpretation (2) of this epigraph leads us to the story of a monument dedicated to a veteran soldier, or a group of veteran soldiers, commended for courage and bravery and who achieved high ranks in the Roman army.
The Evocati Augusti were part of the Praetorian Guard, a special force of guards recruited from the elite of Roman citizens to serve in the protection of the Roman Emperor.
As part of the Praetorian Guard, the most prestigious organisation of the entire Roman Empire, the Evocati were released from the common military duties such as fortifying the camp, making roads etc, having the distinguished responsibility to accompaign and protect the life of the Emperor, at Rome and abroad.
The Evocati Augusti held a great social standing, surpassing the regular Evocati and the Legions and as such exercised a strong influence in the politics of the later Empire.
The epigraph tells us that, after serving the Emperor during approximately 16 years and obtaining a discharge (effectively retiring), the soldier(s) would have enlisted again voluntarily or at the invitation of the regional Consul or other high authority, becoming thus Evocati. In any case, the abbreviation 'VSLM' certifies that the reenlisting followed at free will.
The inscription also evokes the almighty pagan god Jupiter, along with the epithet form 'celestial, heavenly'. Jupiter was considered the king of the gods ruling over the Roman state, the laws and social order, suited for a soldier's monument.
The commemorative stone would have been commissioned by the local authorities. It is probable that the stone was placed inside or near the entrance of the temple of the city -- on top of which the Pieve church was probably built -- and a cerimony would have accompanied the official placement of the commemorative stone - an event occured nearly 2,000 years ago.