In the Iambs of Gregory of Nazianzus occur many hiatuses: this might suggest that his verses had been composed with carelessness. In fact, if we examine the various kinds of hiatuses, we notice that some of them should not be considered as such, because they occur after words, or along with iuncturae, that usually admit them. There remains, however, a considerable number of hiatus in caesura. The article strives to demonstrate that these hiatuses are due to the imitation of the (...) well-known hiatus in trocaic caesura in the hexameter, which was allowed since Homer’s age. As a matter of fact, in some cases, the same words that produce a hiatus after a trochaic caesura in Homer show an identical one after a caesura in Gregory’s trimeters. Moreover, hexameter and iambic trimeter were frequently juxtaposed by the late ancient metric-grammatical tradition. The article further analyzes the occurence of the hiatus in caesura in the Byzantine dodecasyllables, which, among other reasons, might be due also to the influence of Gregory in Byzantine poetry. (shrink)