Between the two sanctuaries, archaeologists have uncovered the Gymnasium of Delphi, which was built in around 330 BC on two flat areas. All along the upper level was the xystos, a colonnade in which the athletes could train under cover, with 83 columns on its facade. In front of the xystos was the open track or paradromis. On the lower level was the palaestra, or wrestling ground, with colonnades around a square court. To the north-west, a circular cistern which stored water for the athletes to bathe in has been found, along with Roman baths. In 1743, a little monastery dedicated to Our Lady occupied the site of the palaestra.