The mid-fourth-century c.e. Cento Vergilianus de laudibus Christi retells the biblical story using cento technique (recombining excerpted lines and partial lines from Virgil into a new poem). Its author, the Christian poet Faltonia Betitia Proba, states that her aim in writing the Cento is to demonstrate that Virgil ‘sang the pious deeds of Christ’ (Vergilium cecinisse … pia munera Christi). Her compositional strategy reflects the exegetical method of typology, as explored in detail by Cullhed: by reusing particular Virgilian verses for biblical characters, Proba creates an implicit typological relationship whereby a Virgilian type both prefigures and is fulfilled by a biblical antitype. This paper first presents an extended model of typology, whereby the type not only prefigures the antitype but also enfigures it, providing the reader with a novel conceptual paradigm through which to understand a particular supernatural reality. The paper then turns to a case study: the baptism scene (380–414), the only passage in the Cento depicting all three members of the Trinity. For each, Proba reuses passages which in the Aeneid describe female characters, hinting at a feminine typological Trinity, one which highlights often-overlooked aspects of the three Christian antitypes. In so doing, she convincingly advances her thesis that Virgil's poetic works reflect typological correspondences to the Christian narrative in a similar way to Old Testament prophecy.