Macragge

Macragge is the capital of Ultramar and the Ultramarines' home, a mountain world whose Fortress of Hera still anchors the Five Hundred Worlds. Guilliman built a working civilisation here before the Emperor arrived, and the planet later hosted Imperium Secundus. Hive Fleet Behemoth died in its skies in 745.M41, and Guilliman himself rose from stasis here at the close of the 41st millennium. Calgar and Sicarius still hold the Fortress of Hera under the Macragge System; Cawl and Yvraine crossed this capital to wake the primarch, tying Ultramar to Baal, Vigilus, and Terra in the same Indomitus chain.