Who was Welsh language campaigner Saunders Lewis?
13 February 2012 Last updated at 08:59 GMT
It is 50 years since the writer and political campaigner Saunders Lewis delivered a speech on the BBC Home Service, predicting the demise of the Welsh language.
His words inspired a movement to save and strengthen the language, and integrate it into everyday life.
So who was the man who changed the fate of the language?
BBC Welsh affairs editor Vaughan Roderick reports.