Spring House of the Nymphs
From Project Athinai
Towards the end of the 6th century BC, a spring house dedicated to the Nymphs was built at the foot of the south slope of the Akropolis Rock, within the Outer Pelargikon. The Akropolis Rock had to be cut back to give space to the northeast corner of the spring house. Besides the Nymphs, Pan, Hermes and Aphrodite were worshipped in this area. Indeed, a marble altar bearing the names of these gods was located nearby.
The drawbasin of the spring house was 3.10 m deep. Its polygonal walls were made of limestone.
The limestone walls of the spring house were 0.50 m thick. The building itself probably measured 4 m wide. A small Doric stoa probably protected the entrance of the spring house to the south.
The columns of the stoa had an upper diameter of 0.32 m. The abacus measured 0.685 m wide. The total height of tthe capital (including neck and abacus) was 0.335 m.
After 419 BC, the spring house was incorporated to the Asklepieion, the sanctuary of Asklepios, and became knon as the "Asklepieion Spring House.
Travlos, John, Pictorial dictionary of Ancient Athens, Books that matter, New York, 1971, p. 138 and 141