The Fountain of Peirene sits at the eastern end of the agora, where the Lechaion Road begins its descent toward the port. In Greek and Roman times it was the sacred heart of the city — the spring where, according to Bellerophon legend, the hero Bellerophon found the winged horse Pegasus drinking. The fountain was used continuously for over a thousand years and went through multiple rebuilding phases, ending with an elaborate Roman facade of arches and painted plaster.
What you see today is largely the Roman-period structure, with its arched facade and forecourt. The draw basins behind it are visible, and the water still collects in the chambers — though no longer drinkable. The museum display on the Peirene explains its hydraulic engineering in detail.