Flavius Zeno (Greek: Ζήνων; floruit 447–451) was an influential general and politician of the Eastern Roman Empire, of Isaurian origin, who served as magister militum per Orientem, and became consul and patricius.
In 447 he was put at the head of an Isaurian unit and entrusted with the defence of Constantinople from Attila.
[3] By this time, he was already magister militum per Orientem (Commander-in-chief of the Eastern army) and was called to defend the capital because all of the other magistri were far away, fighting against the Huns.
[4] In 449 and in 450 he opposed the powerful eunuch Chrysaphius, comes sacrarum largitionum at court, who wanted to obtain Attila's favour.
He opposed the marriage of Attila's secretary, Constantius, and Saturninus'[5] daughter, whom he married to one of his supporters, Rufus.