Within the depth-psychology corpus, the number twelve occupies a distinctive position as a symbol of cosmic totality and structured wholeness. Jung himself identified twelve as the product of four times three — a figure that recapitulates the alchemical axiom of Maria and the fourfold articulation of the transformation process, linking it to the twelve-part zodiac and its division into four triadic stages. This arithmetical phenomenology, as Jung terms it, suggests that twelve is not merely individual but time-conditioned, marking the present aeon. Edinger extends this reading through Revelation’s ‘woman clothed with the sun’ whose crown bears twelve stars, situating the number within the apocalyptic psychology of the God-image. Thielman, working from biblical theology, identifies twelve as the canonical cipher for the people of God — the number underlying the twenty-four elders, the 144,000, and the apostolic community — a usage that resonates with Bill Wilson’s own semi-mythic account of numbering the Twelve Steps and spontaneously connecting them with the twelve apostles. Sasportas and the psychological-astrological tradition read twelve as the structural frame of the horoscope’s houses, with the twelfth house serving as the threshold between individual identity and collective unconscious. The tension between twelve as rational structure and twelve as numinous totality — between the zodiacal calendar and the mystical seal of completeness — runs through every discipline represented in the corpus.