The techniques of sparkling winemaking did not originate with the Benedictine monk Dom Pérignon, nor was the first purposely sparkling wine produced in the region of Champagne. Regardless, through centuries of refinement Champagne has become the world’s leading sparkling wine and the vinous embodiment of luxury and celebration.
When you say "the black grape Meunier (formerly Pinot Meunier)" - When was this changed and by what authority? Was this a declared change in name by INAO? I haven't been able to find anything that suggests this name change has been widely taken up.
Jessie, I don't know that it was an official change so much as it was an acknowledgement of the Champagne region overall simply calling it Meunier. This is highlighted in Peter Liem's new book on Champagne. Admin User could offer a better explanation I'm sure!