The texts of the book are concerned with G. Bergmann's open and new problems and their active role on issues in contemporary metaphysics, like the ontology of ties, connexions and relations, problems of exemplification, substrates and tropes theories, particulars, persistence and the metaphysics of space, time and existence. Papers deal with these themes by themselves, or discuss them in an associated way: some of them aim to clarify the complicated conceptual Relations Bergmann have enlarged with major themes of philosophers like Aristotle, Brentano, Meinong and Sellars. The purpose of the book is to provide some light on his central interests, but also in regard of the evolution of the actual scope of his thought.