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.
The text says that champagne is the only AOP wine in France where the rules allow you to blend red and white wine to make rosé. This is not the case. At least for Crémant de Bordeaux it's the same (see link to the AOP-rules in the compendium www.guildsomm.com/.../AOC_SOMM41.pdf. Not sure if there are any other examples.
Thomas, this is referring to base wine for Champagne. I'm also not seeing any mention of permission of white grapes in rosé Crémant de Bordeaux.