Precursor artifacts are any objects of Precursor origin, particularly ones created and used by the Precursors themselves. This includes the various Precursor structures, devices, and other objects seen in the series, but also includes eco. Some artifacts from during the time of Mar were also referred to as "Precursor artifacts" as he was associated with the Precursors. Precursor artifacts make up a large role in the series and are common in many locations.