The royal palace, or citadel, of Atlantis, as described by the Greek philosopher Plato in the Critias
One of these books was entitled Some comments on Critias which was a reanalysis of the location of Atlantis.
In the comic book Yu-Gi-Oh! by Shonen Jump, Hermocrates (here named Hermos) is one of the three warriors of Atlantis turned into dragons along with Critias and Timaeus in the Waking the Dragons arc of the series.
During antiquity, it ran outside the defensive walls of Athens: Plato wrote in Critias that the river was one of the borders of the ancient walls.