The City of Introspection was a monastic retreat outside of Zimia. Before the Zensunni and Zenshiite slaves retreated to uncharted Unallied Planets, they had toiled for generations on Salusa Secundus. A debate about their exile made followers of fractured faiths to arrive there to study ancient religious and philosophical writings. It was populated by Cogitors and philosophers. Some years before the Butlerian Jihad, it was owned by a Butler trust and the City had gradually blossomed.