Long before trios of tenors toured the globe, there was Luciano Pavarotti. There was also this 1978 performance at Montreal’s Notre Dame Cathedral. I was a young teenager when this Christmas special aired on television, and it was my first exposure to opera. From the opening note, I was mesmerized and moved by the passion and richness of Pavarotti’s voice, and of the cathedral itself. Somehow, the combination of the two makes “Adeste Fideles” seem even more holy.