Corvée labour

>The word "corvée" itself has its origins in Rome, and reached the English language via France. In the Late Roman Empire the citizens performed opera publica in lieu of paying taxes; often it consisted of road and bridge work. Roman landlords could also demand a number of days' labour from their tenants, and also from the freedmen; in the latter case the work was called opera officialis. In Medieval Europe, the tasks that serfs or villeins were required to perform on a yearly basis for their lords were called opera riga. Plowing and harvesting were principal activities to which this work was applied. In times of need, the lord could demand additional work called opera corrogata (Latin corrogare, "to requisition"). This term evolved into coroatae, then corveiae, and finally corvée, and the meaning broadened to encompass both the regular and exceptional tasks.