Apollo Agyieus was an epithet

Epithet

An epithet or byname is a descriptive term accompanying or occurring in place of a name and having entered common usage. It has various shades of meaning when applied to seemingly real or fictitious people, divinities, objects, and binomial nomenclature. It is also a descriptive title...

 of the Greek god

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...

 Apollo

Apollo

Apollo is one of the most important and complex of the Olympian deities in Greek and Roman mythology...

 describing him as the protector of the streets, public places, and the entrances to homes.. As such he was worshiped at Acharnae

Acharnae

Acharnae was the largest deme of ancient Attica; it was located in the northwest part of the Attic plain, south of Mt. Parnes in the general vicinity of the modern suburbs of Acharnes and Ano Liosia, about due north of Athens. The Acharnians chiefly grew cereals, grapes, and olives, although...

, Mycenae

Mycenae

Mycenae is an archaeological site in Greece, located about 90 km south-west of Athens, in the north-eastern Peloponnese. Argos is 11 km to the south; Corinth, 48 km to the north...

, and at Tegea

Tegea

Tegea was a settlement in ancient Greece, and it is also a former municipality in Arcadia, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Tripoli, of which it is a municipal unit. Its seat was the village Stadio....

. The origin of the worship of Apollo Agyieus in the last of these places is related by 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...

.

The cult of Apollo Agyieus was aniconic

Aniconism

Aniconism is the practice or belief in avoiding or shunning images of divine beings, prophets or other respected religious figures, or in different manifestations, any human beings or living creatures. The term aniconic may be used to describe the absence of graphic representations in a particular...

, and this facet of Apollo was worshiped in the form of a pointed column or obelisk, often kept by the front door of a private home, or in the open country, rather than in a temple. This symbol is similar with a sign like an edged cone found on the gate of a temple in the Hittite city Bojatzkoi. In an inscription is mentioned the name of the god Apulunas as the protector of the gate. The Greeks named him Agyieus, as the protector God who draws off evil.
Some writers have held that the omphalos

Omphalos

An omphalos is an ancient religious stone artifact, or baetylus. In Greek, the word omphalos means "navel" . According to the ancient Greeks, Zeus sent out two eagles to fly across the world to meet at its center, the "navel" of the world...

 of the oracle at Delphi

Delphi

Delphi is both an archaeological site and a modern town in Greece on the south-western spur of Mount Parnassus in the valley of Phocis.In Greek mythology, Delphi was the site of the Delphic oracle, the most important oracle in the classical Greek world, and a major site for the worship of the god...

was a modified pillar of Agyieus.. When standing before a house, the stone objects would be decorated with offerings of ribbon, or wreaths of myrtle or bay.