The Cisternoni of Livorno are a series of three large buildings in the neoclassical style at Livorno, in Tuscany, Italy. They were constructed between 1829 and 1848 as part of a complex of purification plants and storage tanks to the Leopoldino aqueduct; a fourth "cisternone" planned at Castellaccia was never built. The "cisternoni", literally "great cisterns", provided Livorno — a city that is still today one of the principal ports of the Mediterranean — with fresh and, more importantly, clean water throughout the 19th and 20th centuries.