A statue of Nike stood in the cella, or otherwise referred to as a naos. Nike was originally the "winged victory" goddess (see the winged Nike of Samothrace) The Athena Nike statue's absence of wings led Athenians in later centuries to call it Nike Apteros (wingless victory), and the story arose that the statue was deprived of wings so that it could never leave the city.
The friezes of the building's entablature were decorated on all sides with relief sculpture in the idealized classical style of the 5th century BC. The north frieze depicted a battle between Greeks entailing cavalry. The south frieze showed the decisive victory over the Persians at the battle of Plataea. The east frieze showed an assembly of the gods Athena, Zeus and Poseidon, rendering Athenian religious beliefs and reverence for the gods bound up in the social and political climate of 5th Century Athens.