Molendinarii and Pistores

In ancient Rome, millers and bakers.

"Until nearly the end of the fourth century, the bakers were also millers. But in the last decades of the century the first water-mills appeared on the slopes of the Janiculum, and from then on the documents make a distinction between the millers, molendinarii, and the pistores. The bakers were responsible not only for making the bread, but apparently also for distributing it. Under Aurelian the daily ration was nearly one and a half pounds of top quality bread. Under Constantine the quantity was doubled but the quality deteriorated, and during the second half of the century it was no longer distributed free but sold at a very low price. It has been estimated that 200,000 people benefited from these distributions."

Claude Mossé, The Ancient World of Work [translated by Janet Lloyd] (1969).