Title issue that will be discussed in this article is a dispute, which began during the postglossators, as to the nature of possession, it means whether it is a legal state or fact. In its resolution doesn’t help a multiplicity of types of possession, which at least six were distinguished by the ancient Romans. Polish legislator continues this trend, because now in Polish law occur, modeled on the roman tradition, possession of things and possession of law, and modeled on the concept of Germanic possession spontaneous and possession dependent. From the roman theory derive contemporary elements of possession, however, have a different meaning. Today very important role is played by factor of will (animus), which allows distinguish autonomous...