Practically all the major Champagne labels offer tours; the Office de Tourisme (beside the cathedral, at 2 Rue Guil?­laume de Machault) is the best source of information on hours and prices.
The tours are of the up most quality. 
mnli hypothesis: The tours are of the up most quality.  premise: Practically all the major Champagne labels offer tours; the Office de Tourisme (beside the cathedral, at 2 Rue Guil?­laume de Machault) is the best source of information on hours and prices.