Collegium Pistorum

The Collegium Pistorum was the officially recognized collegium of bakers in ancient Rome, playing a central role in the production and distribution of bread and the regulation of the Roman grain supply.
In the late Roman Republic, bread shifted from a luxury good to an everyday staple. There is disagreement about its foundation, with some historians arguing that it was founded by the Emperor Trajan while others arguing that it was established in 168 BC to regulate and control the market. Trajan did put the collegium under the Praefectus annonae. The Collegium became critical to the ancient Roman grain supply. As a consequence, the Collegium was granted its own seat in the Senate.
Unlike many Roman collegia it's notability and prestige meant that it attracted historical attention.