Skip to main content

Blastares, Matthew


14th-century Byzantine canonist and monk. Little is known of his life other than that he was a monk and priest first on Mt. Athos, then in the Isaia monastery at Thessalonika. In 1335 he completed his Syntagma, an encyclopedic compilation of ecclesiastical and civil laws to which he added his own commentaries and those of his predecessors, especially Zonaras and the illustrious Theodore balsamon.

The Syntagma groups the laws, not according to subject matter, but according to the Greek alphabet. There are 24 main headings, and within each main section the items are arranged in alphabetical order. The work is completed with a short lexicon of Latin legal terms. Widely translated, the Syntagma influenced the legal codes of late Byzantium and the surrounding nations.

Blastares also entered into his work the theological controversies of his time, wrote against the Latin use of Azymes, composed a Description of the Error of the Latins (unedited), and enscribed a letter to Guy of Lusignan. He is also the probable author of five books written against the Jews, and several liturgical tracts and hymns are attributed to him.

Bibliography: Patrologia Graeca, ed. j. p. migne, (Paris 185766) 144:9601400. h. g. beck, Kirche und theologische Literatur im byzantinischen Reich (Munich 1959) 786787. l. petit, Dictionnaire de théologie catholique (Paris 190350) 2.1:916917. r. janin, Lexikon für Theologie und Kirche, ed. j. hofer and k. rahner (Freiburg 195765) 7:173; Dictionnaire d'histoire et de géographie ecclésiastiques (Paris 1912) 9:160161. j. herman, Dictionnaire de droit canonique (Paris 193565) 2:920925. a. soloviev, Studi bizantini e neoellenici 5 (1939) 698707.

[h. d. hunter]

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Blastares, Matthew." New Catholic Encyclopedia. . 22 Feb. 2019 <>.

"Blastares, Matthew." New Catholic Encyclopedia. . (February 22, 2019).

"Blastares, Matthew." New Catholic Encyclopedia. . Retrieved February 22, 2019 from

Learn more about citation styles

Citation styles gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, cannot guarantee each citation it generates. Therefore, it’s best to use citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

The Chicago Manual of Style

American Psychological Association

  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.