A disputed identity
The figure venerated at Trikala has long been identified with Oecumenius, a Greek biblical commentator. He was once widely believed to have been a bishop of Trikka writing about the year 990, which is the dating reflected in the synaxarion's "prevailing opinion." On this view he was a hierarch and a scholar, whose exegetical works on the New Testament earned him lasting renown.
Modern scholarship has unsettled this identification. The commentary on the Apocalypse traditionally ascribed to Oecumenius has been redated by researchers to the late sixth or early seventh century, with its author located in Asia Minor rather than Thessaly; because of the persistent uncertainty, scholars often speak of "Pseudo-Oecumenius." The commentaries on Acts and the Catholic Epistles transmitted under his name in later manuscripts have moreover been found to coincide with the commentaries of Theophylact of Bulgaria. The question of what this Oecumenius actually wrote, and when he lived, remains genuinely difficult to resolve.