Introduced in , an Artifact is a Precursor relic found on a planet. By building or upgrading an improvement on the artifact tile, the artifact gains Unrecognized icon name Charges, typically twice as many as the previous improvement. Expending a charge grants the civilization a significant bonus. Three levels of improvements are available per artifact, and the third level is a Unrecognized icon name Project for some types, allowing continued generation of Unrecognized icon name Charges. The improvements also have intrinsic bonuses.