H.S. Cronin, and Duchesne. Wettstein in 1715 examined 4 leaves housed at London (Cotton Titus C. XV) and marked them by I. Wettstein cited only 5 of its readings. According to Scrivener it has 57 various readings. Bianchini described portions housed at the Vatican Library. The same portions examined and collated for Scholz Gaetano Luigi Marini. Vienna fragments, Codex Vindobonensis, were examined by Wettstein, who marked them by siglum N. Treschow in 1773 and Alter in 1787 had given imperfect collations of Vienna fragments. Peter Lambeck gave the wrong suggestion that Vienna fragments and Vienna Genesis originally belonged to the same codex. Tischendorf published fragments of this manuscript in 1846 in his Monumenta sacra et profana. Tischendorf considered it as a fragment of the same codex as 6 leaves from Vatican, and 2 leaves from Vienna. Louis Duchesne described the Patmos portions (1876). Athens and New York portions were edited by Stanley Rypins in 1956. A facsimile of all fragments was published 2002 in Athens. Present location The 231 extant folios of the manuscript are kept in different libraries: 182 leaves in the National Library of Russia in Saint Petersburg, 33 leaves in the Library of the Monastery of Saint John the Theologian on the Island of Patmos, Greece, Mark 6:53-7:4; 7:20-8:32; 9:1-10:43; 11:7-12:19; 14:25-15:23; 6 leaves in the Vatican Library in Vatican, Matthew 19:6-13; 20:6-22; 20:29-21:19 4 leaves in London, British Library, Cotton Titus C. XV; Matthew 26:57-65; 27:26-34; John 14:2-10; 15:15-22; they were named the Codex Cottonianus; 2 leaves in the National Library of Austria in Vienna, 1 leaf in the Morgan Library in New York, 1 leaf in the Byzantine Museum in Athens, 1 leaf in the Museum of Byzantine Culture in Thessaloniki 1 leaf in the private collection of Marquis А. Spinola in Lerma (1), Italy. See also List of New Testament uncials Textual criticism Purple parchment Uncial 087 References Further reading Constantin von Tischendorf, „Monumenta sacra inedita“, Leipzig, 1846, pp. 15–24. S. P. Tregelles, "An Introduction to the Critical study and Knowledge of the Holy Scriptures", London 1856, pp. 177–178. F. H. A. Scrivener, A Full and Exact Collation of About 20 Greek Manuscripts of the Holy Gospels, Cambridge and London, 1852, p. XL. (as j) Louis Duchesne, Archives des missions scientifiques et littéraires, Paris, 1876, vol. 3, pp. 386–419. H. S. Cronin, "Codex Purpureus Petropolitanus. The text of Codex N of the gospels edited