Atoma Prime - Hive Tertium: In general, the great Atoman hive city of Tertium is far more "open" in its geographic layout than most hive cities of the Imperium and thus its conurbation is generally less dense than most Imperial arcologies. Yet, it is still an amalgamation of the ramshackle steel layers characteristic of most Imperial hive cities. It is characterised by massive, open cavities within the hive city so large that they even allow voidships and skyfighters to readily pass through and yet remain entirely within the arcology.These open cavities are so expansive that inhabitants of Hive Tertium can be fooled at times that they are living under under open skies until one looks up to see a distant dome of steel boxes marked with massive stalactite-like towers and other artificial structures, all peppered by the pin-points of artificial lights stretching as far as the eye can see. The massive hive city's foundations seem to have been sunk into unsteady ground and are supported by massive pole-like infrastructure in the lower hive levels.The capital city of Atoma Prime, Hive Tertium is the jewel of the Moebian Domain. Hive Tertium was constructed in the 35th Millennium at the behest of Yannice Barquette, the newly-appointed and first known Lord Moebian not descended from the original ruling Moebian dynasty. The industrial boom that saw Hive Tertium and House Barquette's rise to wealth and power on Atoma occurred after the devastating Fringe Wars began in the 35th Millennium.Since Tertium's founding, manufacturing and mining output has been greatly expanded on Atoma Prime. The growth of these industrial actitivites has greatly increased the wealth of the planet but at the cost of the total collapse of its former biosphere and ecosystems, as is so often the result of the establishment of an Imperial hive city. Being a conglomeration of what were once three large but entirely separate Atoman cities, hence the name "Tertium" once they were combined into a single hive, Tertium has been extended upwards by millennia of construction until it has become the massive, continent-straddling arcology it is at present.The opulent and overly indulgent House Barquette was ultimately overthrown by House Margrave in the 36th Millennium after only a single Terran millennium of rule over the hive city and its planet. House Margrave's leader, Anselm Margrave, claimed the office and title of the Lord Moebian and was the first of his house to take upon themselves the office of Lord Moebian.House Barquette would later become infamous in Atoman culture for their overt greed and self-indulgent nature (habits certainly enhanced in House Margrave propaganda after their coup), which could be seen in the attire of the members of their house and those who served them. Barquette Highborn preferred to wear clothing in rich reds and blues covered in elaborate golden patterns and complemented by gold-plated personal armour.Hive Tertium and the husk of a biosphere left on Atoma Prime being a monuments to the unchecked greed of the opportunistic noble houses who overthrew the original Moebian Dynasty in M35. The Margraves would mark themselves apart from the rival noble house of the Barquettes with a more dull and somber attire, adopting dark reds and blue, brown, and black colours into their attire and those who support them. This would mark the beginning of the political rivalry between the two most powerful noble houses of Tertium. One that would continue in current day 41, influencing the divisiveness of Moebian Administratum, Ecclesiarchy, and commoners alike to choose a side.