The Numistrii were one of Pompeii's oldest and most powerful families. All that is certain is that Eumachia was able to use her wealth and social standing to obtain the position of public priestess of the goddess Venus Pompeiana (the city's patron goddess), and she became a successful patronus of the economically significant guild of fullers, the guild which consisted of tanners, dyers and clothing-makers.
The Numistrii were one of Pompeii's most influential and ancient families. All that is certain is that Eumachia leveraged her wealth and social status to secure the position of public priestess of Venus Pompeiana, and she became a prominent supporter of the fullers' guild, which comprised tanners, dyers, and clothing manufacturers.