What is the name of the recurring precursor artifact in the Assassin's Creed series?

The Apple of Eden is the recurring precursor artifact in the Assassin's Creed series.

In the games, Apples of Eden are Pieces of Eden created by the Isu, an advanced civilization that existed before recorded human history. The spherical artifacts can influence minds and generate powerful visual or energetic effects. Their abilities help explain why they are repeatedly sought by both Assassins and Templars.

The first game prominently features an Apple held by Robert de Sablé's forces and later connected to Altaïr's story. Other games introduce additional Apples or related Pieces of Eden, so the term describes a class of artifacts rather than one permanently unique object.

Players sometimes use “Apple of Eden” for every precursor artifact, but the series includes several distinct objects, including Swords, Staves, Shrouds, and Tridents of Eden. The Apple remains the best-known symbol of the Isu technology central to the franchise's mythology.