Haec urbs est Thebae
Abstract This paper analyses the use of proximal deixis in Mercury’s prologue to Plautus’ Amphitruo. The study revolves around the referential ambiguity that characterizes proximal deictics such as here and this city, arguing that it contributes significantly to the blurred distinction between reality and fiction that is typical for Plautine theatre, and for his prologues in particular. The paper shows (1) that proximal deictics play a crucial role in Mercury’s creation of and transition into the fictional world; (2) that their unique referential features during audience address enable Mercury to transform the spectators’ surroundings in addition to his own; and (3) that their use underlines the similarity between Rome and fictional Thebes, which is subsequently connected to the Greek setting of Plautus’ plays and their performance during Roman festivals. Moreover, the paper claims that Mercury partly relies on proximal deixis for the inductive effect of his prologue.