Medieval discussions on rights. Bonaventure -- Godfrey of Fontaines -- Peter John Olivi -- Hervaeus Natalis -- William Ockham -- Richard Fitzralph -- Jean Gerson -- Antoninus of Florence -- The right of the individual. Right as power -- Right as dominion -- Right as a relation -- The species of dominion. The six-fold dominion -- Natural dominion -- Property rights. Justification of private property -- The rights of use (usus) and usufruct (usufructus) -- Ownership (proprietas) and possession (possessio).