Book excerpt: Recent years have seen a growing interest in linguistic phenomena whose formal manifestation and underlying licensing conditions represent the convergence of two or more areas of the grammar, an area of investigation particularly invigorated in recent generative research by developments such as phase theory (cf. Chomsky 2001; 2008) and the cartographic enterprise (cf. Rizzi 1997; Cinque 1999). In this respect, the dialects of Italy are no exception, in that they present comparative Romance linguists and theoretical linguists alike with many valuable opportunities to study the linguistic interfaces, as highlighted by the many case studies presented in this volume which provide a series of original insights into how different components of the linguistic system – syntactic, phonetic, phonological, morphological, semantic and pragmatic – do not necessarily operate in isolation but, rather, interact to license phenomena whose nature and distribution can only be fully understood in terms of the formal mapping between the interfaces.