The Seropian was a center for active retirees in Chicago, Illinois in the United States on Earth.[1] This building is significant for the fact that, before her death, it housed Avery Johnson's much loved Aunt Marcille.


  • The name is likely a tribute to Alexander Seropian, former president and CEO of Bungie.
  • From the vague details in the book it seems to have a lower level where retirees can exercise and talk, and an upper level where retirees reside.


  1. Halo: Contact Harvest
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