THE legal institutes of the ancient Rome, particularly those referring to the Law of Things and Law of Contract, have had a great influence on the solutions which are nowadays still used. Up to this very day, there have been preserved some institutes of Roman law such as: the protection of property, the divisions of things, the right to the property, the right of servitude and the classification of contracts. IN Roman law, in a group of real rights to someone else`s property (jus in re alien), there were, among the others, included the pledge rights. The pledge right is the right of security. Among the pledge rights, the Romans included fiducia, pignus and mortgage.