Foundation figures were ritualistic works of art from the Early Dynastic period that were used in the construction of ancient Mesopotamian temples. Foundation pegs first appeared in ancient Sumer around the third millennium BCE. Stylized as anthropomorphic nails, foundation figures were symbolically used to mark the grounds of a temple. These nails/pegs were either hammered around the foundation of the temple, along with an inscribed tablet, or they were buried in clay boxes under the foundation of the temple. Typically, the pegs were created to represent either the deity that the temple was honoring, or the king that orchestrated the construction of the temple. Many of the pegs discovered stand about a foot tall and show a clear attention to detail. It is believed that foundation figures were used for solely ritualistic purposes. This is because they were not meant to be seen by the public, yet still show a high level of detail and aesthetic thought.

The Anunnaki are a group of deities of the ancient Sumerians, Akkadians, Assyrians and Babylonians. In the earliest Sumerian writings about them, which come from the Post-Akkadian period, the Anunnaki are deities in the pantheon, descendants of An and Ki, the god of the heavens and the goddess of earth, and their primary function was to decree the fates of humanity. They should not be confused with the Apkallu.