this area of Tapani Sector was known for its ore-rich worlds, which were held by the various noble houses. Its capital, and the capital of Tapani Sector, was based on the planet Procopia. During the height of the New Order, it was estimated that there were 345 nobles families which made up the population of The Expanse, broken into Houses. There were seven major Houses which were formed from these families: the greater Houses of Mecetti, Cadriaan, and Melantha; and the lesser Houses of Barnaba, Pelagia, Reena, and Calipsa. Each House has a certain amount of voting power in the Great Council, depending on their current status.