• A memorial (pictured at right) made of Welsh granite was erected near Saint Andrew's Church,
Sempringham, known to locals as Sempringham Abbey, in Lincolnshire. There is also a display about Gwenllian inside the church, although visitors must request the key to enter and view it. • Gwenllian has been commemorated at least twice in poetry. "Gwenllian", by
T. James Jones, was inspired by the site of her memorial stone."In Sempringham" is by
Mererid Hopwood. Hopwood is notable for being the first woman ever to win the
Bardic Chair at the
National Eisteddfod, Wales' top honour for poetry. • On 26 September 2009,
Carnedd Uchaf, in the Carneddau mountain range in
Snowdonia, was formally renamed Carnedd Gwenllian in her memory following a lengthy campaign by the Princess Gwenllian Society. The
Ordnance Survey added the names Carnedd Uchaf / Carnedd Gwenllian on its maps to be published from 2010 onwards. The original name of Garnedd Uchaf, which is within the Bounds of Abergwyngregyn, is Garnedd Lladron. • In 2008 a plaque was placed on the rock just below the summit of
Snowdon commemorating "the Princess Gwenllian (1282-1337), only child of Prince Llewelyn ap Gruffudd, Lord of
Snowdonia, Prince of Wales." This original plaque was removed and damaged in 2018, to be replaced with a near-similar one (shown). ==Primary source references==