The Hengwrt Chaucer manuscript is an early-15th-century manuscript of the Canterbury Tales, held in the National Library of Wales, in Aberystwyth. It is an important source for Chaucer's text, and was possibly written by someone with access to an original authorial holograph, now lost.
The Hengwrt Chaucer is part of a collection called the Peniarth Manuscripts which is included by UNESCO in its UK Memory of the World Register, a list of documentary heritage which holds cultural significance specific to the UK.[1] It is catalogued as National Library of Wales MS Peniarth 392D. Following the terminology developed by John M. Manly and Edith Rickert, the manuscript is conventionally referred to as Hg in most editions giving variant readings.[2]