The Codex Marianus is an Old Church Slavonic fourfold Gospel Book written in Glagolitic script, dated to the beginning of the 11th century, which is (along with Codex Zographensis), one of the oldest manuscript witnesses to the Old Church Slavonic language, one of the two fourfold gospels being part of the Old Church Slavonic canon. History Most of the Codex (172 folios, 171 according to some sources) was discovered by Victor Grigorovich at Mount Athos during a journey to the Balkans in 1844-45, in a hermitage belonging to the "Monastery of the Holy Mother of God" (the Blessed Theotokos), and thus the manuscript was named Codex Marianus in Latin. Grigorovich took the found folios to Kazan', and after his death in 1876 the Codex was transferred to Russian State Library in Moscow where it carries the catalog number грнг 6 (M.1689). Croatian diplomat and amateur scholar Antun Mihanović acquired 2 folios (containing Matthew 5.23 - 6.16) some time before Grigorovich made his discovery, and sent it to renowned Slovene Slavist Franz Miklosich, who had them published in 1850. After Miklosich's death, the two-folio fragment was deposited in the Austrian National Library in Vienna under the catalogue number Cod. Slav. 146. The Codex was first published by Croatian Slavist Vatroslav Jagić in 1883 in Berlin as Quattuor Evangeliorum versionis palaeoslovenicae Codex Marianus Glagoliticus, transcribed in Cyrillic script and with extensive philological commentary in Latin. The reprint was published in Graz in 1960. Linguistic analysis and origin Text of Codex especially abounds with the usage of asigmatic aorist, and very frequent is the assimilation of vowels in compound adjectival declension and present forms (-aago, -uumu instead of -aego, -uemu; -aatъ instead of -aetъ etc.). Analysing the language of the Codex, Vatroslav Jagić concluded that one of the scribes of the Codex came from the Eastern-rite Štokavian area (see Serbian recension), on the basis of substitutions u - ǫ, i - y, u - vъ, e - ę etc. The conclusion about Serbian origin of the Codex has been disputed by Russian slavist Alexander Budilovich who believed that the Codex was written in northern Albania, in northern Macedonia or Mount Athos, in Bulgarian language environment. At the same time the Bulgarian researcher Lyubomir Miletich analysing some dialectal characteristics, claimed Western Bulgarian origin (from Macedonia) of the Codex. Later researchers as Josip Hamm has warned that vocalization of yers (ъ > o, ь >