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Lacus Iuturnae

 p311  Article on pp311‑313 of

Samuel Ball Platner (as completed and revised by Thomas Ashby):
A Topographical Dictionary of Ancient Rome,
London: Oxford University Press, 1929.

Lacus Iuturnae: the spring of Juturna in the south corner of the forum, at the foot of the Palatine, where Castor and Pollux were seen to water their horses after the battle of Lake Regillus in 496 B.C. (Ov. Fasti i.706; Dionys. VI.13; LA 225, 226; Neue Jahrb. 1902, 370‑388). Because of this appearance the temple of Castor and Pollux (q.v.) was built on the  p312 west side of the spring. The same divinities were also said to have appeared on the same spot after the victory of Pydna in 168 B.C. (Flor. I.28.15; Val. Max. I.8.1). The spring, in the shape of a puteal, with Castor and Pollux, is represented on coins of the gens Postumia, of about 90 B.C. (Babelon II.379, Nos. 5‑6; BM Rep. II.310, 718‑723). The water nymph Juturna belonged properly to the river Numicius, but was brought to Rome, and became the tutelary deity of those 'qui artificium aqua exercent' (Serv. Aen. XII.139), and her name was derived from 'iuvare quia laborantes iuvare consuevit' (ib.; Varro, LL V.71; Neue Jahrb. cit. 383; cf. Iuturna, Templum), or from Diuturna (the eternal) (Cic. Pro Cluent. 101; Carcopino, Virgile et les Origines d'Ostie, 115, 480). The water from her spring was regarded as especially wholesome (Frontin. de aq. 4).

This part of the forum was buried deep in rubbish (LS II.202) until 1900, when the 'precinct' of Juturna was entirely excavated (NS 1900, 291‑295; 1901, 41‑144; BC 1900, 67‑74, 285‑295; 1903, 166‑198; CR 1901, 139; Mitt. 1902, 67‑74; 1905, 81‑82; Atti 530‑539; HC 164‑170; Théd. 120‑121, 279‑280; Pl. 214‑220; ZA 96; DR 236‑243; RE Suppl. IV.476‑9). The ruins belong principally to the imperial period, but there are some of earlier date. The lacus itself is a basin 2.12 metres deep, the bottom of which measures 5.13 by 5.04 metres. In the middle of this basin is a quadrilateral base 1.78 metres high and about 3 long by 2 wide, which probably supported marble statues of the Dioscuri with their horses, remains of which, broken into many fragments, were found (they are probably South Italian works of the fifth century B.C.). The basin is paved with marble slabs, beneath which is a considerable extent of tufa pavement with a different orientation (that of the precinct of Vesta) belonging to the earlier structure, and lying at about 10.90 metres above sea-level (JRS 1922, 5, 21). The lower walls of opus reticulatum rise to the same height on three sides as the base just mentioned, which appears to have been the level of the precinct in republican times. On this wall is a ledge about 1.50 metres wide, and round this a later wall of opus incertum, 1.23 metres high, with travertine curbing and indications of a metal balustrade. At the top the basin measures about 10 metres square. The whole inner surface of the basin was lined with marble, and at the north-east and north-west corner of its pavement are the two springs by which it has always been fed. The east side of the basin was entirely changed by being built over in the fourth century, in order, apparently, to provide quarters for the Statio Aquarum (q.v.). An altar with representations of the Dioscuri and Helen (as Selen) with Jupiter at one end and Leda on the other, which was found in the basin, is probably Hadrianic (SScR 233). About 4 metres south of the lacus is an altar on which are sculptured a male and a female figure (no doubt Juturna taking leave of Turnus) in the style of the time of Severus; a well with marble curb or puteal, on which is an inscription  p313 that records a restoration and dedication by M. Barbatius Pollio, probably the partisan of M. Antonius​1 (Mitt. 1902, 70; Klio 1902, 233‑234); and an aedicula, consisting of a cella and pronaos, with two marble columns. A statue of the goddess undoubtedly stood in the apse of the aedicula, and a fragment of the epistyle was found near by, inscribed IVTVRNAI S (Klio, loc. cit.). The aedicula of Juturna abuts against a room with an apse of good Hadrianic brickwork, which lies in the axis of the Nova Via. In Christian times it became an oratory of the Forty Martyrs of Sebaste (Mitt. 1902, 82; 1905, 85, 86; HC 160‑161). Cf. HFP 39, and add. to Minerva, templum.

Just east of the lacus, between it and the wall of the atrium Vestae, a ramp ascended from the forum to the Nova via, and the intervening space was over part of the lacus itself. In these rooms were found fragments of inscriptions relating to the curatores aquarum and the statio aquarum, or headquarters of the water department of Rome (NS 1900, 293; 1901, 129‑131; BC 1900, 72; Mitt. 1902, 72‑73; Klio 1902, 235; Théd. 311‑312). One of these inscriptions, on the pedestal of a statue dedicated to Constantine on 1st March, 328, records the restoration of the statio at that time by the curator aquarum, Fl. Maesius Egnatius Lollianus. It is therefore probable that the statio occupied these rooms as offices in the fourth century, but how much earlier is not known. A statue of Aesculapius, another of Apollo (fifth century B.C.) and other sculptural remains, found in this precinct, lend some support to a theory that in the second and third centuries there was some sort of a sanatorium of Aesculapius established here (Neue Jahrb. cit., 384‑388); and in the early Middle Ages the springs were still used, as is shown by the large number of jugs of the eighth century which have been found.

The Authors' Note:

1 The archaism Iuturnai, which is also found on the puteal, has been thought by some to point to the time of Claudius.

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