Venetus A is the more common name for the tenth century (AD) manuscript catalogued in the Biblioteca Marciana in Venice as Codex Marcianus Graecus 454, now 822.
Venetus A is the most famous manuscript of the Homeric Iliad; it is regarded by some as the best text of the epic. As well as the text of the Iliad, Venetus A preserves several layers of annotations, glosses, and commentaries known as the "A scholia", and a summary of the early Greek Epic Cycle which is by far our most important source of information on those lost poems.