View looking north across the north end of the Upper Agora at Sagalassos. The columns on the right and left of the Nymphaeum are two of the four in the agora that bore the statues of famous people (benefactors) of Sagalassos. The dark portion of the façade has been stained by the water that has been flowing there for about a year and a half.
The Nymphaeum is 92 ft. [28 m.] long and about 30 ft. [9 m.] high. It was fed by water from the Hellenistic Fountain House and the basin contains 21,400 gal. [81 cubic meters] of water. Its overflow was in turn sent south down to the Nymphaeum in the Lower Agora.
The basin area and the rear wall were found basically intact. The façade, with its columns and entablature, are in the main reconstructed from material found in the vicinity of the nymphaeum. On each end there are two significant protrusions (with four columns each) and in-between them four protrusions with two columns each. It was probably during the reign of the Roman Emperor Marcus Aurelius (r. 161–180).