This chapter examines the role of music in overcoming national borders during festivities and ceremonies linked to national churches in Rome in the early modern era. During this period, the papal city was extremely cosmopolitan; there were not only pilgrims and other passing visitors, but also stable national communities that were well integrated into working, social and ceremonial life. For this reason, there was a great number of institutions supporting and representing these communities: embassies, hospitals, congregations, churches and noble families supported the cause of the “nations,” both defining the landscape of the city and contributing in a more or less explicit fashion to its subdivision into “national” districts.