The Ricemarch Psalter is an 11th-century Welsh illuminated psalter, in a late Insular style, that has been described as "Hiberno-Danish", instead of the usual "Hiberno-Saxon", as it reflects Viking influence. Its 159 pages are vellum, and include the following sections: Letter of St. Jerome to Chromatius and Elidorus; Breviarius Apostolorum; Martyrologium Hieronymianum, and Various Tables. It is one of two surviving manuscripts from the scriptorium at Llanbadarn Fawr in Wales, established by the father of the scribe and the first owner. The other is a manuscript of St. Augustine's De Trinitate in Cambridge, by the same scribe. The psalter is now at Trinity College, Dublin as MS 50.