Adriana Belletti here collects work by top scholars presented at the University of Siena in connection with a visit by Noam Chomsky. The eight articles collected here go beyond strictly mapping syntactic properties, touching on broader theoretical questions related to Chomsky's Minimalist Program in particular. The cast of contributors is the selling point of the volume, and includes Guglielmo Cinque, Richard Kayne, Luigi Rizzi, Noam Chomsky, and others. Their high reputations, combined with the collection of cutting-edge research in one place, will interest scholars and students of generative lingustics.