Year 123 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Balearicus and Flamininus (or, less frequently, year 631 Ab urbe condita). The denomination 123 BC for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
Events
By place
Roman Republic
Gaius Gracchus elected Romantribune for the first time. He waited until after his re-election the following year before pushing forward the various civil and agrarian reforms that his brother championed in 133 BC.