Brought together here are most of the presentations made at the Merleau-Ponty seminars which were held at the Husserl Archives, Paris, in 1998-99 and 1999-2000. Some of the essays in English come from the Twenty-second Annual International Meeting of the Merleau-Ponty Circle which was held at Seattle University from the 18th to the 20th of September, 1997. And finally, there are a certain number of important Italian contributions, among which is the "Introduction" that Enzo Paci - one of the great figures in Italian phenomenology - wrote in 1958 for the translation of In Praise of Philosophy. This collection allows us to understand better the genesis of Merleau-Ponty's ontology and, in particular, the importance of his reflections on Nature. Texts by: Renaud Barbaras, Etienne Bimbenet, Patrick Burke, Philippe Cabestan, Mauro Carbone, Pierre Cassou-Nogues, Jean-Noel Cueille, Francesco Colli, Francoise Dastur, Pascal Dupond, Fred Evans, Paolo Gambazzi, Nicoletta Grillo, Galen A. Johnson, Samuel J. Julian, Antje Kapust, Leonard Lawlor, Glen Mazis, Dorothea Olkowski, Guido D. Neri, Enzo Paci, Alessandro Prandoni, Franck Robert, Michael Sanders, Jenny Slatman, Ted Toadvine, Robert Vallier, Amedeo Vigorelli, Agata Zielinski.