Decimus Junius Brutus
Around 139 BC, Romans began arriving in the area, as a consequence of the expeditionary campaigns of Decimus Junius Brutus. At the time, Conímbriga was already a built-up settlement. The Romans introduced the formal organization of space to the settlement. Owing to the peaceful nature of rural Lusitania, Romanisation of the indigenous population was quick, and Conímbriga became a prosperous town.