The annual commemoration on 16 September marks the day in 1400 when Glyndŵr was proclaimed Prince of Wales by his followers, sparking a 15‑year uprising against the rule of Henry IV. Although the rebellion was ultimately unsuccessful, it became a defining moment in Welsh history, inspiring a renewed sense of identity and pride.
Cadw, the Welsh Government’s historic environment service, cares for hundreds of sites across Wales — including several besieged by Glyndŵr during his campaign, such as Coety, Dinefwr and Kidwelly castles.
Minister for Culture Jack Sargeant said:
“Owain Glyndŵr remains one of Wales’ most forthright figures, whose legacy continues to shape our national identity today. By offering free access to children at Cadw’s sites in his name, we’re connecting our next generation with this pivotal period in Welsh history.”
Gwilym Hughes, Head of Cadw, added:
“We hope that by offering free entry to those under 17 more people will be encouraged to visit Cadw locations and give their families a real taste of Wales’ exciting and varied history.”
The offer applies to all Cadw sites open on Sunday 14 September. Usual admission charges apply to accompanying adults.
Normally charged Cadw sites — free for under‑17s on 14 September
Kidwelly Castle, Carmarthenshire
One of Wales’ best‑preserved medieval fortresses, with a dramatic riverside setting and links to the 1136 battle in which Princess Gwenllian was killed.
Laugharne Castle, Carmarthenshire
A picturesque ruin overlooking the Taf estuary, once a Tudor mansion and later inspiring poet Dylan Thomas.
Cilgerran Castle, Pembrokeshire
Twin‑towered fortress perched above the Teifi Gorge, with a history of sieges and strategic importance.
Lamphey Bishop’s Palace, Pembrokeshire
Elegant medieval retreat for the bishops of St Davids, featuring grand halls and tranquil grounds.
St David’s Bishop’s Palace, Pembrokeshire
Magnificent 14th‑century palace ruins beside St David’s Cathedral, reflecting the wealth and influence of the medieval church.
