Largest Roman ReservoirsThere is a difference between cisterns and reservoirs: cisterns are commonly subterranean, rock cut, without a particular inlet or outlet, apart from a kind of well-top plus cover. Its main purpose is to store rain water. Reservoirs are often larger, sub- or superterranean, masonry built, and mainly used to store aqueduct water, and equipped with an inlet and one or more outlet(s).In some Roman towns - like in Pompeii (Italy) for instance - many houses were equipped with a cistern under the impluvium to store rain water. After the town got an aqueduct, the cistern was also connected to the aqueduct. The biggest reservoirs were related to baths buildings especially in Rome (Baths of Diocletian and Caracalla) and in (North) Africa. To feed the biggest reservoirs in Rome, special adaptations were necessary to the extant aqueduct lines. The major reservoirs of Constantinople, all built after 400 AD, were uncovered and comparable to lakes behind artificial dams. In late antiquity Constantinople was also equipped with many not less impressive, subterranean reservoirs like the Bindirdirek reservoir 'with the thousand and one columns'. The next group of huge reservoirs were all in North Africa and some in the present Middle East. The famous Piscina Mirabilis is the largest one in present Italy. Note: As indicated below, often there is some discussion about the capacities of these reservoirs. Some scholars indicate its maximum volume, others give a modest figure for reservoirs were seldom used to its maximum capacity. |
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Wilson2008 suggested Chieti (still missing) and Aptera on Crete (2 reservoirs of each 3250 m3 based on sanders1982 who also suggested the two reservoirs at Eleutherna, each 5500 m3)
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