Wasn't quite sure where to put this...
Found this short 10min doco on youtube last night about Chimay. What I found really interesting was the old monk who back in the 50/60's extracted single yeast cells from certain strains of yeast. He then propagated each cell, tested it on the beer until he found the single cell he was after. Chimay have been brewing from that single cell ever since.
Chimay Brewery
Gotta love the Chimay.