This article challenges the argument of John Moles that Luke's preface (1.1–4) resembles a Greek decree more than any other type of writing. Although Moles is not the first to recognise the supposed decree-like features in Luke's preface, he goes further by arguing that the preface is intentionally structured like a decree for the author's rhetorical aim. In this article, I demonstrate that Moles’ argument goes too far and that Luke's preface simply displays features conventional to prefaces of historiographical writing – despite common structural patterns of preface writing and decree formulae – and is not layered with additional rhetorical meaning.