for the freedman Tiberius Claudius Chryseros and two women, probably his wife and daughter
Rome differed from Greek city-states in allowing freed slaves to become plebeian citizens. The act of freeing a slave was called manumissio, from manus, "hand" (in the sense of holding or possessing something), and missio, the act of releasing. After manumission, a slave who had belonged to a Roman citizen enjoyed not only passive freedom from ownership, but active political freedom (libertas), including the right to vote. A slave who had acquired libertas was known as a libertus ("freed person", feminine liberta) in relation to his former master, who was called his or her patron (patronus).
As a social class, freed slaves were liberti, though later Latin texts used the terms libertus and libertini interchangeably. Libertini were not entitled to hold public office or state priesthoods, nor could they achieve legitimate senatorial rank. During the early Empire, however, freedmen held key positions in the government bureaucracy, so much so that Hadrian limited their participation by law. Any future children of a freedman would be born free, with full rights of citizenship.
The Claudian Civil Service set a precedent whereby freedmen could be used as civil servants in the Roman bureaucracy. In addition, Claudius passed legislation concerning slaves, including a law stating that sick slaves abandoned by their owners became freedmen if they recovered. The emperor was criticized for using freedmen in the Imperial Courts.
Some freedmen enjoyed enormous success and became quite wealthy. The brothers who owned House of the Vettii, one of the biggest and most magnificent houses in Pompeii, are thought to have been freedmen. A freedman who became rich and influential might still be looked down on by the traditional aristocracy as a vulgar nouveau riche. Trimalchio, a character in the Satyricon of Petronius, is a caricature of such a freedman.