[2] His father Paulos Antiochos, who died around 1177, founded a small female convent at the Forum Bovis.
[1][4] Before 1175 Antiochos was judge of the velon, and was sufficiently prominent to hold the funeral oration of Emperor Manuel I Komnenos (r. 1143–1180) on 22 January 1181.
[8] In 1196 he is mentioned again in a document of the monastery of Great Lavra as megas droungarios tes vigles, with the rank of protonobelissimohypertatos.
[4] Antiochos left a varied corpus of letters, speeches, eulogies and epitaphs, which are an important source for contemporary Byzantine history.
[4] In his work, he appears "a defender not only of imperial omnipotence, but also of the senate; he favored 'democratic' phraseology but stood aloof from military commanders".