According to the legend, the emissarium (outlet) which still drains it was made in 39 8 -397 B.C., the Delphic oracle having declared that Veii could only be taken when the waters of the lake reached the sea.
Cuniculus, Emissarium, and the same author's Chapitre d'histoire Pontine (Paris, 1889).
According to the legend, the emissarium of the Alban Lake was constructed in obedience to the Delphic oracle, which declared that, until it was drained, Veii could not be taken.
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