An opisthodomos can refer to either the rear room of an ancient Greek

Ancient Greek

Ancient Greek is the stage of the Greek language in the periods spanning the times c. 9th–6th centuries BC, , c. 5th–4th centuries BC , and the c. 3rd century BC – 6th century AD of ancient Greece and the ancient world; being predated in the 2nd millennium BC by Mycenaean Greek...

 temple or to the inner shrine, also called the adyton

Adyton

The adyton or adytum was a restricted area within the cella of a Greek or Roman temple. Its name meant "inaccessible" or "do not enter". The adyton was frequently a small area at the farthest end of the cella from the entrance: at Delphi it measured just nine by twelve feet. The adyton would...

 ('not to be entered'); the confusion arises from the lack of agreement in ancient inscriptions

Epigraphy

Epigraphy Epigraphy Epigraphy (from the , literally "on-writing", is the study of inscriptions or epigraphs as writing; that is, the science of identifying the graphemes and of classifying their use as to cultural context and date, elucidating their meaning and assessing what conclusions can be...

. In modern scholarship, it usually refers to the rear porch of a temple. On the Athenian Acropolis

Acropolis

Acropolis means "high city" in Greek, literally city on the extremity and is usually translated into English as Citadel . For purposes of defense, early people naturally chose elevated ground to build a new settlement, frequently a hill with precipitous sides...

 especially, the opisthodomos came to be a treasury, where the revenues and precious dedications of the temple were kept. Its use in antiquity was not standardised. In part because of the ritual secrecy of such inner spaces, it is not known exactly what took place within opisthodomoi: it can safely be assumed that practice varied widely by place, date and particular temple.

Architecturally, the opisthodomos (as a back room) balances the pronaos or porch of a temple, creating a plan with diaxial symmetry. The upper portion of its outer wall could be decorated with a frieze, as on the Hephaisteion

Temple of Hephaestus

The Temple of Hephaestus, also known as the Hephaisteion or earlier as the Theseion, is the best-preserved ancient Greek temple; it remains standing largely as built. It is a Doric peripteral temple, and is located at the north-west side of the Agora of Athens, on top of the Agoraios Kolonos hill....

 and the Parthenon

Parthenon

The Parthenon is a temple on the Athenian Acropolis, Greece, dedicated to the Greek goddess Athena, whom the people of Athens considered their virgin patron. Its construction began in 447 BC when the Athenian Empire was at the height of its power. It was completed in 438 BC, although...

.

Opisthodomoi are present in the layout of:

• Temples ER, A and O at Selinus
• Temple of Aphaea
  Temple of Aphaea
  The Temple of Afea The Temple of Afea The Temple of Afea (the name Afea appears on all the local signs, Afea being the name of a Cretan woman of unsurpassed beauty. After escaping a unwelcome marriage on Crete, she was rescued by a fisherman from Aegina. In payment for this he also proposed an...
  
   at Aegina
  Aegina
  Aegina is one of the Saronic Islands of Greece in the Saronic Gulf, from Athens. Tradition derives the name from Aegina, the mother of Aeacus, who was born in and ruled the island. During ancient times, Aegina was a rival to Athens, the great sea power of the era.-Municipality:The municipality...
  
  
• Temple of Zeus
  Temple of Zeus
  The Temple of Zeus at Olympia was an ancient Greek temple in Olympia, Greece, dedicated to the chief of the gods, Zeus. It was the very model of the fully developed classical Greek temple of the Doric order...
  
   at Olympia
  Olympia, Greece
  Olympia , a sanctuary of ancient Greece in Elis, is known for having been the site of the Olympic Games in classical times, comparable in importance to the Pythian Games held in Delphi. Both games were held every Olympiad , the Olympic Games dating back possibly further than 776 BC...
  
  
• Hephaisteion
  Temple of Hephaestus
  The Temple of Hephaestus, also known as the Hephaisteion or earlier as the Theseion, is the best-preserved ancient Greek temple; it remains standing largely as built. It is a Doric peripteral temple, and is located at the north-west side of the Agora of Athens, on top of the Agoraios Kolonos hill....
  
   in the Agora
  Agora
  The Agora was an open "place of assembly" in ancient Greek city-states. Early in Greek history , free-born male land-owners who were citizens would gather in the Agora for military duty or to hear statements of the ruling king or council. Later, the Agora also served as a marketplace where...
  
   of Athens
  Athens
  Athens , is the capital and largest city of Greece. Athens dominates the Attica region and is one of the world's oldest cities, as its recorded history spans around 3,400 years. Classical Athens was a powerful city-state...
  
  
• Parthenon
  Parthenon
  The Parthenon is a temple on the Athenian Acropolis, Greece, dedicated to the Greek goddess Athena, whom the people of Athens considered their virgin patron. Its construction began in 447 BC when the Athenian Empire was at the height of its power. It was completed in 438 BC, although...
  
   on the Acropolis in Athens
• Temple of Poseidon on Cape Sounion
• Temple of Apollo Epikourios
  Bassae
  Bassae or Bassai, Vassai or Vasses , meaning "little vale in the rocks", is an archaeological site in the northeastern part of Messinia Prefecture that was a part of Arcadia in ancient times. Bassae lies near the village of Skliros, northeast of Figaleia, south of Andritsaina and west of Megalopolis...
  
   at Bassae
• Temple of Athena Lindia at Lindos
  Lindos
  Lindos is an archaeological site, a town and a former municipality on the island of Rhodes, in the Dodecanese, Greece. Since the 2011 local government reform it is part of the municipality Rhodes, of which it is a municipal unit. It lies on the east coast of the island...
  
  
• Temple of Dionysus at Teos
  Teos
  Teos or Teo was a maritime city of Ionia, on a peninsula between Chytrium and Myonnesus, colonized by Orchomenian Minyans, Ionians, and Boeotians. The city is situated on a low hilly narrow strip of land connecting two larger areas of land . Teos ranked among twelve cities comprising the Ionian...