Mark the Deacon (Latin: Marcus Diaconus; Greek: Μάρκος ό Διάκονος) was a Roman Christian hagiographer.
A native of the province of Asia, he was the companion of Bishop Porphyrius of Gaza from 395 until 420, a deacon in his church and his biographer.
[1] Mark went to Thessalonica to arrange the sale of the property still owned by Porphyrius there and, upon his return, the proceeds were distributed among the monasteries of Egypt and among the necessitous in and around Jerusalem.
[1] Mark's Vita sancti Porphyrii (Life of Saint Porphyrius) is "the most detailed account of the Christianization of a smaller Greek city that we possess" and its historical value is therefore high.
[3] Formerly it was known only in a Latin translation, but in 1874 Moriz Haupt published the Greek text, and a new edition was issued in 1895 by the Bonn Philological Society.