Owain Glyndŵr (c.1354–c.1416) led the most significant Welsh independence uprising against English rule—creating a brief Welsh state with its own parliament, laws, and international recognition.
Triggered by a land dispute with English lord Reginald Grey, Glyndŵr's revolt expanded into a national movement. Key achievements:
Patronized poets (Iolo Goch), commissioned manuscripts, inspired later Welsh identity movements. The revolt's suppression (1409–1415) was brutal—starvation tactics, executions, land confiscations.
Glyndŵr disappeared (likely died c.1416), becoming a once and future king figure. His seal—gold dragon on white field—inspired the modern Welsh flag. 2000 millennium celebrations featured him prominently.
He didn't achieve lasting independence, but Owain Glyndŵr gave Wales a vision of sovereign nationhood that persists six centuries later.