The phallus occupies a wide and contested terrain in the depth-psychology corpus, ranging far beyond its anatomical referent to function as one of the primary symbols of creative energy, sacred power, and psychic generativity. Jung establishes the foundational interpretive frame in ‘Symbols of Transformation’ and ‘Memories, Dreams, Reflections’: the phallus represents libido in its creative aspect, an ‘indefinite expression with many meanings’ that points toward the numinous rather than the merely sexual. His childhood dream of an enthroned subterranean phallus — etymologically linked to shining and brightness — anchors a reading of the symbol as chthonic divinity, a counterpart to the official religious order. Neumann extends this into the mythological archaeology of consciousness, tracing the phallus through Osiris, the Great Mother’s consort-figures, and the cult of fertility kings. Kerényi and Otto illuminate the Dionysian dimension: the phallophoriai, the figure of Dionysos as Enorches, and the equation of spermatic vitality with the god’s sovereignty over life. Burkert situates phallic display in its apotropaic and territorial functions, linking Greek herms to primate behavior. Hillman, in ‘Senex and Puer’, reads the symbolic phallus as the expression of puer-consciousness — vertical, erected, overdetermined — distinguishing cult images of erection from anatomical realism. Lacan’s ‘big phi’ (Φ) introduces the structuralist register in which the phallus becomes the master signifier, the veiled term that organizes desire and lack within the signifying chain. The tension between these registers — archetypal/sacred, anthropological/apotropaic, libidinal/symbolic, and structural/linguistic — gives this entry its particular scholarly richness.