Original: He did not live to see the end of the Franco dictatorial regime, but he was posthumously honoured by the Spanish government under King Juan Carlos I which, in 1976, issued a commemorative postage stamp to Pau Casals in honour of the centenary of his birth.
Simplified: He did not live to see the end of the Franco dictatorial regime. Later, when Franco had died and Spain was a democracy once more, the Spanish government under King Juan Carlos I, issued a postage stamp in honour of the centenary of his birth.