An ars grammatica (English: art of grammar) is a generic or proper title for surveys of Latin grammar.
Extant works known as Ars grammatica have been written by
The most famous ars grammatica since Late Antiquity into the modern day has been that composed by Donatus.
Two ars grammatica circulate under the name Donatus. The first, the Ars Minor, is a brief overview of the eight parts of speech: noun, pronoun, verb, adverb, participle, conjunction, preposition, and interjection (nomen, pronomen, verbum, adverbium, participium, conjunctio, praepositio, interjectio). The text is presented entirely in a question-and-answer format (e.g. "How many numbers does a noun have?" "Two: singular and plural.").
Donatus' Ars Major is only a little longer, but on a much more elevated plane. It consists of a list of stylistic faults and graces, including tropes such as metaphor, synecdoche, allegory, and sarcasm. Donatus also includes schemes such as zeugma and anaphora.
The Ars Grammatica or De Oratione et Partibus Orationis et Vario Genere Metrorum libri III by Diomedes is a Latin grammatical treatise. Diomedes wrote probably in the late 4th century AD. The treatise is dedicated to a certain .
The third book on poetry is particularly valuable, containing extracts from Suetonius' De poetica. This book contains one of the most complete lists of types of dactylic hexameters in antiquity, including the teres versus, which may (or may not) be the so-called "golden line."
The Ars of Diomedes still exists in a complete form (although probably abridged). It was first published in a collection of Latin Grammarians printed at Venice by Nic. Jenson, about 1476. The best edition of Diomedes's Ars Grammatica is in H. Keil's Grammatici Latini, vol I.