The Pillar of Eliseg also known as Elise’s Pillar or Croes Elisedd in Welsh, stands near Valle Crucis Abbey, Denbighshire, Wales, at grid reference SJ204442. It was erected by Cyngen ap Cadell (died 855), king of Powys in honour of his great-grandfather Elisedd ap Gwylog. The form Eliseg found on the pillar is thought to be a mistake by the carver of the inscription.
The Latin inscription not only mentions several individuals described in the Historia Britonum, but also complements the information presented in that text. A generally accepted translation of this inscription, one of the longest surviving inscriptions from pre-Viking Wales.
The Pillar was thrown down by the Roundheads during the English Civil War and a grave under it opened. Edward Lhuyd examined the Pillar and copied the inscription in 1696. The lower half disappeared but the upper half was re-erected in 1779. The original inscription is now illegible.