The Glagolita Clozianus is a 14-folio Glagolitic Old Church Slavonic canon miscellany, written in the eleventh century.
Linguists somewhat disagree when discussing the source of the text; some, arguing on the similarity of the rounded Glagolitic with Sinaitic codices (Psalterium Sinaiticum, Euchologium Sinaiticum), hold that the manuscript originated in Macedonia, and others that it was written in Croatia, justifying it with the change of ь to ъ behind palatal č, ž, št and žd, a trait commonly found in other Croatian Glagolitic mediaeval manuscripts.
The text was first published by Jernej B. Kopitar (Vienna 1836, the first 12 folios), together with the Freising Fragments and the manuscript De conversione Bagaorium et Carantanorum.
Critical edition with Ancient Greek originals was published by Václav Vondrák (Glagolita Clozùv 1893) and finally by Antonín Dostál (Clozianus, staroslověnsky hlaholský sborník tridentský a innsbrucký, Prague 1959).
Dostal's edition contains photographs, Cyrillic transcription, Ancient Greek original, translations to Czech and a dictionary.