What is the opposite of fief?

The opposite of a fief, which is a piece of land granted by a lord to a vassal in exchange for loyalty and service, could be considered a common land or public domain. While a fief is associated with feudal ownership and private control, common land is accessible to the public and not owned by any single individual. Additionally, in a broader sense, a fief represents hierarchical ownership, whereas common land embodies egalitarian principles.