What is Ephesian reconstructionism?

Ephesian reconstructionism aims to reconstruct, to the extent practical, the ancient religion of Ephesus in modern day Turkey. It was at the time a part of Greece.

Ephesian Pantheon

The Ephesian pantheon differs from the standard Athenian group of twelve gods we call the Olympians. At the center of it all, of course, is Artemis Ephesia, who is completely separate from Artemis of the rest of Ancient Greece. She may have been renamed to Artemis at some point, but theories here seem to vary.

Gods

Artemis Ephesia: Patron goddess of Ephesos. Many of the major festivals were in her honor. Her statue has lead many to misunderstand her as a fertility goddess, but this is not the case. Instead, she seems to be associated with rites of passage and liminal stages of life, divine epiphany, and protection. She was worshiped by men and women of various social classes. Possible fish cult!
Other Artemis: Artemis Kourotrophos: Guardian of Children, and Artemis Protothronia: Of the First Throne are attested.
Hekate: Has a long history in Ephesos and the Karians had established a temple to her.
Kybele: The Great Mother was sometimes equated with Artemis Ephesia, sometimes venerated separately. The mountain today called Mt. Panayirdag was originally sacred to her, but Artemis Ephesia took over later. At some point, they may have been worshiped side-by-side.
Attis: Lover of Kybele. One early Hellenistic mold of him as a deceased, bandaged child.
Zeus: Sometimes worshiped as the consort of Meter (see below). His epithets were Patroios (Paternal), Keraunios (Of the Thunderbolt), Hyetios (Bringing Rain), Meilichios (Merciful), Despotes (King), Ktesios, Olympios, Panhellenios, Sabazios, Soter (Savior), and Panhellenios, who had a mystery cult. Worshiped at the Magnesian Gate and his temple on Mt. Pion.
Apollon: Had a temple in Ephesos and nearby Larisa. Epithets included Apollon Klarios, Patroios, Panteios (Of Panteios), Panionios (Pan-Ionic), Pythios (Pythian), Hikesios (of Asylum Rights), and Embasios (Of the Launching and Sailing of Ships).
Leto: Ephesos considered itself the birthplace of Apollon and Artemis, but embraced connections with Delos, the traditional birthplace of the twins.
Ortygia: Nymph who helped Leto give birth to Artemis and Apollon. She is a naiad of the Ortygian Grove in Lycia, where this took place. She is also the nurse of Apollon and sometimes identified with Asteria, the goddess who is the personification of the island of Delos.
Dionysos: Most popular male god in Ephesos. Ecstatic rituals were dedicated to him, as well as the Dionysia festival. His epithets here were Phleus (associated with Demeter pro Poleos, outside the city, meaning unclear; could be related to reeds or fruitfulness), Oreiogyadon (meaning unclear), Oreios Bakheos pro Poleos (not sure what this one means either - related to the mountain god Oreios?), Poimantrios, and Phleus Poimantrios (Shepherding the Flock). He too had mysteries celebrated in his honor, and his initiates wore garments made of goat hair.
Demeter: Had a temple. Her Eleusinian cult was popular here as in many other parts of Ancient Greece. Her cult was often combined with that of Dionysos'. The Thesmophoria were celebrated as well. One epithet Ephesians used for her was Karpophoros (Fruit-Bearer).
Kore: Worshiped in Prytaneion and as a part of the Eleusinian cult.
Nereids (Nymphai): Depicted on temple.
River gods: Kaystros (father of the namesake of Ephesos), Marnas, Kenchreios and Klaseas.
Mousai: Area named after them; depicted in artwork. Dedicatory inscription made in thanks for poetic accomplishments.
Athena: Had a shrine on Mt. Pion, and perhaps a separate temple as well. During the Roman era, she was honored annually with a festival as Minerva. She played a part in the myth of the foundation of the city of Ephesos. Her epithets here included Areia (Warlike) and Pammousous (Patron of All Arts).
Ares: Had a Roman era festival as Mars. An altar was dedicated to him, Zeus, Enyalios and Andreia (Courage).
Aphrodite: Featured on many dedications and statuettes, sometimes with Eros. Her epithets included Hetaira, Aphrodisias, and Daitis, the last of which was the focus of a mystery cult. The meaning of Daitis may have been the same as Automata (Spontaneous Love) or Epidaetida.
Eros: Depicted on many statuettes.
Priapos: THere is one statuette, so it's a bit hard to say for sure if he was worshipped.
Hermes: Worshiped on Mt. Pion; many herms.
Nemesis: Worshiped at theater, stadium, and Magnesian Gate. Household statuettes, and replica of Smyrnaean dual Nemesis.
Asklepios: Had a medical school, sanctuary, and priests.
Hygeia: Votive offerings, household statuettes.
Hestia: Worshiped at the Prytaneion as Hestia Boulaia (Of the Boule). Likely worshiped in individual homes as well. Often worshiped alongside Demeter or Artemis.
The Eternal Fire: Mentioned separately from Hestia; the subject of worship at the Prytaneion alongside her.
Poseidon: Popular enough that scholars thought he had replaced Artemis Ephesia at some point. Had a festival and numerous sacrifices. This is Helikonian Poseidon to be specific.
Hephaistos: Had a priesthood
Agathe Tykhe: Worshiped even after Christianity spread. Her main epithet seems to have been Tykhe Soteira (Savior).
Homonoia: Concord. Had a statue that may have been the subject of worship in front of the theater.
Nike: Worshiped in Prytaneion, and mentioned in inscriptions.
Selene: Depicted in architectural artwork, likely at least a little syncretized with Artemis (perhaps during later periods?).
Helios: Also depicted in architectural sculpture. Unclear if he was the subject of worship.
Thanatos: Depicted on temple. Unclear if he was the subject of worship.
Hypnos: Statue donated to gymnasium.
Hades: Depicted on temple.
Pan: Gifted Artemis a cave where women were sent to reveal if they were virgins (?!), part of Dionysiac mysteries and had a role as a god of war.
Samothracian Gods: Had a temple. Identities unclear.
Kabiroi
Enedra: Mysterious Dionysian deity. Name indicates hiding or ambushing characteristic.
Ge: As Ge Karpophoros (Fruit-Bearing).
Plouton: Had an altar.
Meter: Unclear identity; her name just means Mother. She was called Meter Oreia or Meter Phrygie. Honored with votive monuments and inscriptions. Accompanied by lions and 2 male deities whose identities are unknown.
Theos Hypsistos
Theos Kinnaios: May indicate Apollon's dog. Worshiped in Prytaneion.
Pion: Mountain god.
Sabazios: Phrygian god. Had an altar.
Men: Phrygian moon god. Had a sacred banquet and priesthood. Patron of a specific village.
Sosipolis: Deity of ambiguous nature worshiped at the Prytaneion; savior of the city.
Themelioi: Gods who firm the ground and protect buildings from earthquakes.
Sarapis: Greco-Egyptian god of the afterlife. Very popular.
Isis: Egyptian Aset. Sometimes equated to Artemis. Had a temple of her own and a sacred ship. Patron of sailors and fishermen. First fruits of new year's sailing trips offered to her. She was addressed as Isis Pelagia and Thalasses Kuria (Lady of the Sea).
Anubis: Egyptian Anpu. One dedication from the 3rd C. B.C.
Apis Bull: Depicted on coins in a building of unclear function.
Amun-Ra: May be the identity of a statuette found in a possible temple. Very uncertain one here.
Kouretes: Sometimes called the inventors of the Ephesia Grammata. Hid Leto from Hera while she gave birth.

Heroes

Androkles: Boar hunter with a dog who established city. Had a tomb.
Alexander the Great: Had a temple.
Pixadoros: Found the marble quarry which was used to build the Artemision. May have had a tomb.
Publius Servilius Isauricus: Roman proconsul who advocated for the Asian parts of the Roman Empire.
Apollonios of Tyana: Cult associated with Apotropaic Herakles. Saved Ephesos from a plague.
Herakles: As Herakles Apotropaios (Averter of Evil/Disease), Herakles Idaios and Victorious Herakles.
Theseus: Depicted on temple.
Sinis: Depicted on temple.

Sources

Ephesus Museum in Selçuk
Gods, heroes, and personifications at Ephesus
Fragment Mentioning Demetriasts and Initiates of Dionysos Phleos (177-192 CE)
Theoi.com
Paul, Artemis, and the Jews in Ephesus by Rick Strelan
Discoveries at Ephesus by JT Wood
"The Images of Artemis Ephesia and Greco-Roman Worship: A Reconsideration" by Lynn R. LiDonnici

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