Ark

Ark is a name given to two massive Forerunner installations, both designed with the primary purpose of manufacturing Halo rings. Situated outside the Milky Way galaxy, they also served as Lifeworker research facilities, as well as conservational preserves for the numerous species of the galaxy, preserved by the Forerunners during the Conservation Measure. The Arks were shaped like massive flowers, consisting of several curved arms, similar to the petals of a flower, surrounding a circular Halo construction foundry in the center.

Two Arks existed during the Forerunner-Flood war; the greater Ark, which produced Halos 30,000 kilometers in diameter, and Installation 00 or the lesser Ark, which produced rings 10,000 kilometers in diameter. Both of these constructs are known to have been distinctly referred to as "the Ark", though the lack of references to another Ark at the time of the Human-Covenant War, as well as the designation of the lesser Ark as the Halo Array's "Installation 00", suggest that the greater Ark was either destroyed or is no longer active.

List of appearances

 * Halo 2
 * Halo Graphic Novel
 * Second Sunrise Over New Mombasa
 * Halo 3
 * Halo Legends
 * Origins
 * Homecoming
 * Halo: Cryptum
 * Halo: Combat Evolved Anniversary
 * Terminals
 * Halo: Primordium
 * Halo: Silentium