The fifteen studies assembled here grew out of research on south-Italian ordinary chants and tropes for the multi-volume series Beneventanum Troporum Corpus II, edited by John Boe in collaboration with Alejandro Planchart. In the present essays, clerical and ordinary chants and tropes of the Mass (especially when derived from paraliturgical hymns and poems), certain aspects of chant notation and particular facets of the old Beneventan and the old Roman chant repertories are examined in relation to the three main cultic centres of the Italian south - Benevento, Montecassino and Rome - and as they relate to their European context, namely Frankish and Norman chant and the varieties of chant sung in Italy north of Rome. The volume includes one previously unpublished study, on the Roman introit Salus Populi.