Gwenlyn Parry was one of the most important Welsh-language playwrights of the twentieth century and played a key role in the popularisation and flourishing of drama in the theatre and on television during the 1970s and 1980s. Parry’s major stage plays – Saer Doliau, Tŷ ar y Tywod, Y Ffin and Y Tŵr – had a substantial impact.