Sostratus was a Greek mythological

Greek mythology

Greek mythology is the body of myths and legends belonging to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. They were a part of religion in ancient Greece...

 hero, he was a friend of Hercules

Hercules

Hercules is the Roman name for Greek demigod Heracles, son of Zeus , and the mortal Alcmene...

.

He was Achaea

Achaea

Achaea is one of the regional units of Greece. It is part of the region of West Greece. It is situated in the northwestern part of the Peloponnese peninsula. The capital is Patras. The population exceeds 300,000 since 2001.-Geography:...

n from the ancient city of Dyme, held in veneration by its inhabitants. When Pausanias

Pausanias (geographer)

Pausanias was a Greek traveler and geographer of the 2nd century AD, who lived in the times of Hadrian, Antoninus Pius and Marcus Aurelius. He is famous for his Description of Greece , a lengthy work that describes ancient Greece from firsthand observations, and is a crucial link between classical...

 mentioned him when he visited Dyme, in the side of a public road where it had the tomb of Sostradus in which it was built by Hercules for his honoring his friend. At his tomb. it had a pillar with the form of Hercules in which the Dymeans received them military service.

Different sources and archeology which identified with Polystratus, a hero of Dyme which he helped Hercules in the war against the Elean king Augeas

Augeas

In Greek mythology, Augeas , whose name means "bright", was king of Elis and father of Epicaste. Some say that Augeas was one of the Argonauts....

and he was killed there. In archaeological excavations founded a pillar with that which was recorded by Pausanias where it had the tomb of Sostratus not with the name Polystratus.