> The titanic perspective of this structure clicked into place. The carriers looked like toys. The twin teardrop shapes had to be thirty kilometers end to end. This could only be the Covenant command-and-control center, the Unyielding Hierophant.
>
> Nylund, Eric (2010-12-21). Halo: First Strike (p. 301). Tom Doherty Associates. Kindle Edition.
Universe page has it listed at only 11 km long…
https://www.halowaypoint.com/en-us/universe/vehicles/unyielding-hierophant