Although Naples was one of Europe’s largest cities (after London and Paris), studies of the management of its water supply during the early modern period are sorely lacking, despite growing interest in the subject at both an Italian and European level. Naples was perhaps unique in relying on a vast and tortuous underground network of reservoirs, cisterns, channels and conduits, accessed by well shafts, all fed by an ancient aqueduct. The present study outlines and evaluates the Neapolitan water supply as it existed in the period, analysing the archival records of the municipal tribunal responsible for the city’s infrastructure, the ‘Tribunale della Fortificazione, Acqua e Mattonata’, and its various ‘Appuntamenti’ (proposals), ‘Conclusioni’...