The object of desire occupies a structurally pivotal position across the depth-psychology corpus, functioning not merely as what is sought but as a formally necessary placeholder within the architecture of longing itself. Lacan’s treatment dominates the field: in Seminar VIII he insists that the object of desire is irreducibly partial — a fragment, a metonymic remainder rather than a satisfying whole — and that its most privileged representative, the phallus-as-signifier, occupies the symbolic place of constitutive lack. Desire, for Lacan, does not aim at the object so much as it circulates around the void the object masks. The agalma — the hidden treasure attributed to Socrates by Alcibiades in Plato’s Symposium — serves as Lacan’s mythic illustration: the object of desire is precisely what cannot be shown, the dazzling thing concealed within the beloved subject. Aristotle provides an earlier architectonic, distinguishing object, desire, and animal as a motivational trichotomy while leaving unresolved whether desire itself is a physical item. Carson’s reading of Eros illuminates the temporal dimension: the lover in the moment of desire loses self-control and is seized by ‘now,’ a disruption the non-lover strategically evades. Nietzsche, via Sharpe and Ure, introduces a counter-movement: the object of desire is not given but cultivated, transformed through aesthetic habituation. Across these registers, the term names a site of theoretical contest between lack, projection, partiality, and pedagogical formation.