Buried in the miscellaneous writings of Capuchin abbess Sor María Ángela Astorch (1592-1665) is a curious spiritual exercise the author calls ‘teatro santo’. In it, Sor María, never herself investigated by the Inquisition, imagines herself as a priest being sentenced to death in an auto de fe. The exercise is practised in total solitude, but also requires props and costume. Sor María inhabits various identities and voices in her account, moving freely between genders and roles, as well as between her embodied identity and her imagined ones. This article argues that the ‘teatro santo’, while singular in its particulars, may give insight into how a female public reacted to the diverse genres of performance that characterize the Spanish Baroque. Sor María’s identification with multiple ‘characters’, and her creative self-insertion into the narrative, shows how early modern women could cultivate creative freedom within, and without disturbing, the most restrictive spaces.