WW1 conscientious objector Morgan Jones MP 'hero'
He was a schoolteacher jailed for refusing to fight in World War One.
Morgan Jones later became Labour MP for Caerphilly - the first conscientious objector to be elected to parliament.
In a lecture in Westminster on Tuesday night, his successor in that constituency will argue that Mr Jones is an "unsung hero" who could be seen as the father of modern devolution.
BBC Wales' parliamentary correspondent David Cornock reports.