Calixus
Some interesting points:
THE MISERICORD:
The ship follows a set route between three planets, as part of its trade charter. It is viewed by the locals as a sign of ill omen, but the most interesting part is this:
The Misericord is a great fusion of lesser vessels, essentially a well maintained and deliberately created space hulk.Inside, the Misericord resembles a huge, complex and grotesquely ornate castle. Many different ships make up the Misericord and they each have their own style, which in turn has been embellished and replaced over the centuries. In places where the component ships connect, corridors can become precipitous shafts, rooms can be upside-down and moving from place to place can be very complex, although the void born crew are adept at clambering up makeshift ladders or even leaping pits in the floor. The Misericord’s interior is archaic, with feasting halls, dungeons, cobwebbed processional galleries and many other places that seem to have little connection to the business of the ship or the needs of the crew.
SCINTILLA-capital, hive world, population of a mere 25 billion. This is lower than the normal range of hive worlds and it isn't the only world that falls outside the usual population ranges.
IOCANTHUS-war torn agri-world with a population of staggering (by agri world standards) 5 billion.
SPECTORIS-aquatic agriworld with a more normal population of 2 million. It is exempt from making contributions to the Imperial Guard because its food production work is more important to the sector.