Marriage occupies a central and contested position within the depth-psychology corpus, functioning simultaneously as sociological institution, archetypal constellation, individuation path, and sacred or quasi-sacramental bond. Jung’s foundational 1925 essay treats marriage as a psychological relationship shaped by unconscious parental complexes, anima-animus projections, and the dialectic of container and contained — a framework elaborated and critiqued by Samuels, Stein, and Harding alike. Hillman fractures any single definition by cataloguing competing fantasies: marriage as sacrament containing life’s shadows, as vocation calling only certain individuals, as cosmic symbol whose dissolution amounts to a ‘radical cosmological horror,’ and as the principal theater in which the child archetype is enacted rather than the conjunctio. Campbell reframes the institution around sacrifice to the relationship itself as a third entity transcending both partners. Harding brings a clinical feminist lens, mapping the social compulsions, anima-animus illusions, and psychic onesidedness that corrupt or animate conjugal life. Guggenbühl-Craig’s axis of ‘well-being versus salvation’ crystallizes the tension between therapeutic comfort and the suffering intrinsic to individuation through marriage. The hieros gamos or sacred marriage persists as an archetypal substrate in alchemical, Gnostic, and mythological registers, connecting the personal institution to cosmological themes of union, separation, and transformation.