The Jesuit preacher and missioniser Francesco de Geronimo was a native of Grottaglie in southern Apulia, and was active both there and in Naples until his death in 1716. The role of the Jesuits as conductors of popular missions throughout Italy has been receiving increasing scholarly attention in recent decades, as part of an exploration of the impact and reception of the Counter-Reformation. Like many a young Italian Jesuit of the time de Geronimo aspired to carry out missionary work in the Indies; his superiors thought it was just as important to do his evangelising in ‘the Indies of down here’ – Naples and the Italian south. The proceedings of a conference held in 2005, as part of the bicentenary celebrations of de Geronimo's beatification in 1806 (he was canonised thirty-three years later), bring together seventeen articles. They cover subjects as diverse as the historiography of the saint (Spedicato), de Geronimo and the Jesuit missionary tradition in the ‘Neapolitan province’ (Orlandi), the missionary styles of the Jesuits and Lazarists in the south of Italy (Campanelli), de Geronimo's introduction of the cult of St Cyrus in Grottaglie (Quaranta), and the Jesuits in the Italian south and in Grottaglie in particular following the Restoration (Dandolo). Given de Geronimo's importance as a popular preacher, fully four articles explore the style and content of his preaching (Nestola, Epifani, Moccia, Occhibianco). The collection offers a welcome exploration and contextualisation of the activities of a popular preacher like de Geronimo, as well as a contribution to our understanding of the important missionising drive of early modern Catholicism.