Port Maw

Port Maw is the Gothic Sector's naval capital, a hollow artificial planetoid whose 500-kilometre aperture gave it the name. The 60th Expedition found it in the Coronid Deeps, Terra ordered a northern fleet fortress built inside, and traitor officers later turned its panopticon on the assembling loyalists. In the Gothic War the station sat impregnable behind mines and forts, and Chaos blockaded it for almost the whole campaign.