This study aims at investigating the evolution of moraic structure from Latin to Italian. The quantitative distiction among vowels was lost in the evolution to Romance, and moraic structure exerted influence during the evolution to Neo-Romance languages. Based on such information and on Hayes' Moraic Theory (1989), we intend to investigate the effects of such change in the mentioned languages by analysing related phonological processes, such as gemination, diphthongization, and monophthongatio. Moraic Theory allows us to identify the way moraic structures are attributed to languages and also allows us to determine which priciples operate in these languages. We propose that the choices made in Italian to deal with moraic structure in Latin have already been available in vulgar Latin, and, according to the option made, principles such as Stray Erasure and Parasitic Delinking, which are related to Prosodic Licensing, have more or less applicability. [ABSTRACT FROM AUTHOR]