Grammaticus, Diomedes
A Latin grammarian (circa 300 CE) who wrote a treatise on grammar called Ars grammatica (aka De Oratione et Partibus Orationis et Vario Genere Metrorum libri III).
The work consists of three books:
(1) Book I discusses the parts of speech;
(2) Book II, grammar and style; and
(3) Book III discusses poetry and meter.

1. Some claim that this book contains the most complete list of the types of dactylic hexameters that were used in antiquity.

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