The Psalter of Caimín is a medieval Irish illuminated manuscript likely produced in the 11th century, possibly on the island of Inis Cealtra in Lough Derg.
[2] It kept in the library of University College Dublin (MS.A.i) The main text recounts the Gallican Psalter, and is set in a single narrow column in the middle of each folio, and written in large half-uncial minuscule case.
The margins are thus wide, and contain extensive glosses in both Irish and Latin;[1] it is, along with the Southampton Psalter, one of only two surviving manuscripts to contain annotation in both of these languages.
Based on the style of Irish and the decorations found in the glosses, an approximation of the late 11th century is generally accepted,[1] although it was believed to be a genuine relic of Saint Caimín for a short period.
It is first mentioned in 1639 by Archbishop James Ussher, when it was described as "among the books of the Convent of Franciscans at Donnegall".