The
Peniarth Manuscripts, also known as the
Hengwrt-Peniarth Manuscripts, are a collection of
medieval Welsh manuscripts originally collected by
Robert Vaughan (
c.1592–1667) of Hengwrt,
Merionethshire, and in the 19th century housed in Peniarth Mansion,
Llanegryn, Merioneth. The collection contains some of the oldest and most important Welsh manuscripts in existence.