Codex Claromontanus is a 5th or 6th-century Greek-Latin diglot manuscript containing the Pauline Epistles and Hebrews. It is notable for having Greek and Latin texts on facing pages and for containing an early stichometric catalogue of Old Testament books.

Contains an almost complete text of the Catholic and Pauline epistles. The manuscript features scholia at the foot of the pages attributed to John Chrysostom, and the uncial text is separated into paragraphs by comments written in minuscule script.

It contains large lacunae in Acts 1:1-8:10 and in Hebrews 13:10-25.

It is a Greek/Latin diglot containing an Old Irish verse on folio 23v written by a disappointed pilgrim. The manuscript suffered severe water damage during World War II.