Independent scholar Alex Hourani tells me that he has created a Greek text from manuscripts of a largely unpublished medieval text. The anti-heretical work, which is referred to under various titles, was composed between 1026-28 by the deeply obscure Demetrius, Metropolitan of Cyzicus. What little is known about him can apparently be found in H.G. Beck, Kirche und theologische Literatur im Byzantinischen Reich (Munich, 1959), p.532, although I have not looked.1 A page at Dumbarton Oaks tells us that Demetrius was appointed syncellus in 1029, and later made oikonomos of the Great Church, sometime before April 1032.
His Greek text is here:
The text is there entitled “Expositio Breuiter Doctrinae Iacobitarum” (ἔκθεσις κατ᾿ ἐπιτομὴν τοῦ τῶν Ἰακωβιτῶν δόγματος καὶ τῶν ἀλλων ὧν ποιοῦσι παρὰ τὴν ἐκκλησιαστικὴν καὶ ὀρθόδοξον πίστιν τε καὶ παράδοσιν, “An exposition in summary form of the doctrine of the Jacobites and of the other things which they do contrary to the ecclesiastical and orthodox faith and tradition, written by Demetrios, Metropolitan of Cyzicus“).
However it is also referred to sometimes as “Liber de rebus Armeniae (contra Iacobitas),” and a shortened version of it appears under that title in Patrologia Graeca 127, cols. 880-84, where it is wrongly attributed to Philippus Solitarius. The text was printed from MS. Paris gr. 1315.2
The old McClintock and Strong article on Philip the Solitary mentions the work, and an AI search tells me that the 1648 Combefis editio princeps labelled it “De Fide et Coeremoniis Armeniorum, Jacobitarum, Chatzitzacriorum et Romanorum seu Francorum”.3.
A list of manuscripts appears in the Pinakes database here. Hourani’s text is from MS Real Biblioteca Escorial R. I. 15, MS Sinai Greek 1795, and MS Heidelberg Cod. Pal. Graec. 356, ff. 129-132v. These include a preface indicating that it was composed at the request of Constantine VIII (1025-1028).
There is a discussion and summary of the text in German, see T. H. Benner, “Die syrischjakobitische Kirche unter byzantinischer Herrschaft im 10. und 11. Jahrhundert” (PhD diss., Marburg, PhilippsUniversität, 1989), 123–26; see also Z. Chitwood, “The Patriarch Alexios Stoudites and the Reinterpretation of Justinianic Legislation against Heretics,” GRBS 54 (2014): 300–301.4
The work is of interest as the first text to explain the term “Melchite”. Dr H. has also drafted an interesting article on the origins of the term which is on Academia here. Here is the relevant passage (I have slightly revised the translation which is very literal):
4. τοῦ τοίνυν δηλωθέντος Ἰακώβου τὸ τοῦ Εὐτυχοῦς δόγμα πεπαῤῥησιασμένως κηρύττοντος, σχίσμα γέγονεν ἐν τοῖς Σύροις. καὶ οἱ μὲν Ὀρθόδοξοι οἰ τῇ συνόδῳ καὶ τῷ βασιλεῖ Μαρκιανῷ ἀκολουθήσαντες, ἐκλήθησαν Μελχῖται· ὡς φρονοῦντες τὰ τοῦ ὀρθοδόξου βασιλέως. ἐπεὶ μελχὶ λέγεται καθ’ Ἐβραίους καὶ Σύρους ὁ βασιλεὺς. οἱ δὲ Εὐτυχιανισταὶ καὶ ἐπὶ τούτοις Μονοθελῆται, οἱ τῷ μοναχῷ Ἰακώβῳ τῷ εὐτελεῖ καὶ ἀνωνύμῳ Σύρῳ πεισθέντες, ὠνομάσθησαν Ἰακωβῖται. καὶ ἔκτοτε μέχρι τοῦ νῦν, οὕτως ἀπ’ ἐκείνου καλοῦνται.
4. This Jacob preached the doctrine of Eutyches outspokenly, and a schism happened among the Syrians. The orthodox, who followed the synod and the emperor Marcian, were called Melchites, as if they held to the opinions of the orthodox emperor, because a king is called “melchi” according to the Hebrews and the Syrians. The Eutychianists and also the Monothelites who were persuaded by Jacob, the worthless monk and nameless Syrian, were called Jacobites. Since that time, and until now, they are called as such after him.
Here’s a DeepSeek output for the first section of the text:
An exposition in summary form of the doctrine of the Jacobites and of the other things which they do contrary to the ecclesiastical and orthodox faith and tradition; written by Demetrios, Metropolitan of Cyzicus; at the prompting of the Christ-loving lord Constantine, the purple-born emperor; in which there is also (a section) concerning the Chatzitzarioi:—
(1) Since God has bestowed upon the world your nature, that transcends nature and is truly most kingly as a choice possession, O good-loving lord; and having granted to your might the readiness in all things; in you alone of all men He wondrously mingled things that cannot be mingled: kingship and teaching; the flower of the purple and the power of words; and for this reason you have already turned many of the Hebrews from the error handed down from their fathers; and you have refuted no few of the Athinganoi and Paulicians; and you yourself have been deemed worthy to become the mouth of God, according to the divine oracles; for He who brings out, it says, the worthy from the unworthy, “as my mouth shall he be”.
But now the great and burning zeal for God has stirred you up also to the refutation of the Jacobites; so that these too, holding distorted and blasphemous doctrines, may not escape notice, creeping in under the guise and skin of sheep as wolves, and falsely calling themselves orthodox. In clear and concise language I shall set before your majesty the matters concerning their heresy from the books of the Fathers; adding also the matters concerning the Chatzitzarioi, just as you commanded. And the affairs of the Jacobites stand as follows. …
The “Chatzitzarioi” or Staurolatrians5 seem to be an Armenian cross-worshipping judaising group of the period.
Always interesting to see bits like this.

- James Morton, “Law and Orthodoxy under the Komnenoi”, Dumbarton Oaks Papers 76 (2022), 145-162, p.151, n.32. Online here.[↩]
- Bernadette Martin-Hisard, “Le discours des Georgiens sur leur orthodoxie: les heretiques Armeniens et Pierre le Foulon (VIIe-XIIe S.)”, in: Rivista di Studi Bizantini e Neoellenici 47 (2010) 195-264, p.243, n.204.[↩]
- François Combefis, Novum Auctarium Graeco-Latinae Bibliothecae Patrum, Volume 2, columns 261ff, Paris, 1648, but I have been unable to access the book.[↩]
- Morton, q.v., n.33.[↩]
- Andreas Rhoby, “Byzantine Greek Words in English Vocabulary?” online here.[↩]



