Ar(t)chive, a retroactivist technique for queer worldmaking in art therapy, invites sexual, gender, and relationship diverse (SGRD) clients to engage with queer forms from history and construct a continuum of shared lived experiences across differences to challenge misinformation and discrimination, foster resilience, and build community. Phases include: (1) assessment and informed consent; (2) collection and curation; (3) display and artmaking; (4) intersubjective meaning making and synthesis; and (5) closing and reflexivity. A vignette illustrates its application within a queer adult online art therapy group. Resources are offered for adaptive implementation and advocates for the proliferation of more equitable and affirming art therapy practices.