The fourteenth century saw the production of innumerable Islamic manuscripts, many of which were extensively and expertly illuminated. The period is well-studied, in particular, the products of the ateliers of Baghdad, Tabriz, Shiraz and Cairo. This article concerns a manuscript from a less well-known production centre, namely that of Erzincan. This manuscript is a copy of Jalāl al-Dīn Rūmī's Mas̲navī produced in 774/1373. Although discussed briefly in previous scholarship (and attributed to Erzincan), there is much more to say about this skilfully and extensively illuminated manuscript. This article examines the manuscript's text, codicology, illuminations, inscriptions and wider historical context. In doing so, it substantiates the manuscript's connection to Erzincan and adds to the growing body of literature concerning the arts of the book of thirteenth- and fourteenth-century Rūm.