famous painters of the time. It is 98 meters long and consists of an outer Doric colonnade with 44 columns and an interior one the rhythm of which has not been clarified whether Ionic or Corinthian. In the 3rd century BC in front of the Stoa of Echo the monument of Ptolemy II (Philadelphus's) and Arsinoe was built . The monument consists of a large stone platform, length 20 m and 4 m wide, which at both ends carries two Ionic columns, height 8.89 m, on which were placed the gilded statues of Ptolemy and Arsinoe. From the impressive stone monument stands the platform and parts of the Ionic columns. Editor Olympia Vikatou, archaeologist http://odysseus.culture.gr/
Nymphaeon The spring, also known as the Exedra of Herodes Atticus, one of the most opulent and impressive constructions inside the Altis, was situated between the temple of Hera and the treasury terrace. It stood at the end of a much-needed supply of pure drinking water brought to Olympia in AD 160 from springs east of the sanctuary and distributed by a dense network of pipes. Prior to that, water came from wells and was in short supply, especially during the Olympic Games when thousands of visitors flooded the sanctuary. The monumental spring comprised two tanks backed by a two-storeyed apse, which rose to a half-cupola. The apse (16.62 metres in diameter) was of brick with polychrome marble revetment and had two tiers of eleven niches each, which held statues of the families of Antoninus Pius (lower tier) and of Herodes Atticus (upper tier). The central niche of each tier contained a statue of Zeus. Inside the apse was a large semicircular water tank. A marble bull, now on display at the Olympia Archaeological Museum, stood in its middle; it bore an inscription recording that Herodes dedicated the reservoir and its statues to Zeus in the name of his wife Regilla who was a priestess of Demeter Chamyne. An oblong basin, 21.90 metres long and 3.43 metres wide stood in front of the semicircular tank. At each end of this lower tank a small circular Corinthian temple, 3.80 metres in diameter, enclosed a statue; these represented Herodes Atticus and Antoninus Pius or Marcus Aurelius. Several of the monument's statues are displayed in the museum.