A monument to commemorate the 1170 battle of Pentraeth. Following the death of Owain Gwynedd in 1170, a bitter struggle broke out between his sons over who would inherit the right to rule the kingdom of Gwynedd. The first action on this long-running conflict was the battle at Pentraeth where Hywel Ab Owain Gwyned, the likely nominated heir was killed alongside his six foster-brothers, by his half-brother Dafydd ab Owain Gwynedd

The memorial was erected on the bank of the river Nodwydd as it enters the sea in Red Wharf Bay in 1986 by the local civil society. The inscription reads:

CYNGOR BWRDEISTREF YNYS MON
HYWEL AB OWAIN GWYNEDD
TYWYSOG A BARDD
LLADDWYD MEWN BRWYDR
YM MHENTRAETH YM 1170
"CARAF EI MORFA A'I MYNYDDOEDD"

Translation:
ANGLESEY BOROUGH COUNCIL
HYWEL AB OWAIN
GWYNEDD PRINCE AND POET
KILLED IN A BATTLE IN PENTRAETH IN 1170
"I LOVE ITS COASTLAND AND ITS MOUNTAINS"
Louise Barker, RCAHMW, November 2016