Diwrnod Owain Glyndŵr hapus / Happy Owain Glyndŵr day Ai Llythyr Pennal yw un o'r llythyrau pwysicaf a ysgrifennwyd erioed yn hanes Cymru? Is the Pennal Letter one of the most important letters ever written in Welsh history? | Llyfrgell Genedlaethol Cymru | The National Library of Wales

Owain ap Gruffudd, known to history as Owain Glyndŵr, was a visionary leader, soldier, and statesman. He led the last major Welsh revolt against English rule with the goal of reclaiming Welsh sovereignty, established the first Welsh Parliament under his leadership, and was the last native-born Welshman to claim the title Prince of Wales. As the architect of Welsh democracy, Owain Glyndŵr’s legacy continues to inspire the ongoing journey toward greater self-determination for Wales. Naming this ke

Rebellion begins. Mae’r gwrthdaro yn dechrau. Tickets are now on sale for Owain & Henry, the historical epic by Olivier Award-winning playwright Gary Owen, co-directed by Michael Sheen and Steffan Donnelly. See Michael Sheen as Owain Glyndŵr for the first time in a fiery reflection on the “hotch-potch of peoples who became England” that burns as fiercely today as it did six centuries ago. 🎟️ Watch the full video and book now: wmc.org.uk/owain henry Performances 5–21 November 2026. Mae tocynnau

#OnThisDay in 1406, Owain Glyndŵr sent a letter, now known as the Pennal Letter, to Charles VI King of France requesting assistance for help in his rebellion against English rule. Learn more about the letter and its significance here👇 🔗https://blog.library.wales/pennal-letter/ | Llyfrgell Genedlaethol Cymru | The National Library of Wales