The so-called Katherine Group is a group of five 13th century Middle English texts composed by an anonymous author of the English West Midlands, in a variety of Middle English known as AB language. The texts are all addressed to anchoresses (religious recluses) and praise the virtue of virginity:
All five texts are preserved in the manuscript Oxford, Bodeian Library, Bodley 34. All except Hali Meiðhad are also in British Library, Royal 17 A XXVII. Additionally, British Library Cotton Titus D XVIII has Sawles Warde, Seinte Katherine and Hali Meiðhad.
The Katherine Group is similar in language and content to the Ancrene Wisse and the Wooing Group.
J. R. R. Tolkien repeatedly published on the Katherine Group, in Holy Maidenhood (1923), Some Contributions to Middle-English Lexicography and The Devil's Coach-Horses (1925), Ancrene Wisse and Hali Meiðhad (1929) and "Iþþlen" in Sawles Warde (1947).