The trust of the new Civil Code of Quebec of 1994 relies on the innovative juridical framework of "patrimony by appropriation". The present thesis analyzes the new trust and situates it within a broader perspective through comparisons with the Common law trust and an examination of the alternative approaches to fiduciary institutions in Civil law jurisdictions. The notion of patrimony by appropriation implies that the corpus of the Quebec trust constitutes ownerless property. Despite its novelty, we find that the concept is compatible with the civilian theories of droit subjectif and patrimony, as well as with the other parts of the new Code. The Quebec solution is also able to emulate most of the Common law trust's functional advantages, n...