Most of the Codex was discovered by 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, and thus the manuscript was named Codex Marianus in Latin. Grigorovič 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. Croatian diplomat and amateur scholar Antun Mihanović acquired 2 folios some time before Grigorovič 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 catalog 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. Reprint was published in Graz in 1960.
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. Analysing the language of the Codex, Vatroslav Jagić concluded that one of the scribes of the Codex came from the Eastern-rite Štokavian area, on the basis of substitutions u - ǫ, i - y, u - vъ, e - ę etc. The conclusion about Serbo-Croatian 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 of the Codex. Later researchers as Josip Hamm has warned that vocalization of yers, as well as the occasional disappearance of epenthetic l, suggests Macedonian provenience. According to F. Curta, the book was "certainly of Macedonian origin", written "either in Ohrid or in one of the monastic centers in the region." According to H. G. Lunt, "Certain deviations from the theoretical norms indicate Macedonian influences, others possibly Serbian ". There are a number of arguments that link the Codex Marianus with territory that bordered that of Serbia. It is difficult to answer whether the Codex was created before the end of the First Bulgarian Empire, or after its Byzantine conquest, i.e. into the theme of Bulgaria. Lunt proposed the 1030s, but David Diringer dates it from the late 10th century.
Legacy
The book is enumerated in Bulgarian, Macedonian and Serbian historical literary corpus. Codex forms the base text for the contemporary rendition of the New Testament on the basis of the Slavic recensions in the series Novum Testamentum Palaeoslovenice.
