Yes, he was a great organist and pianist, too. I heard him playing a lot of times in St. Eustache, Paris. Some people didn't like when he was improvising because it sounds to them like "terrible noise". But when he played Bach and all the famous composers especially at the Sunday afternoon organ recitals, it was wonderful and everyone was fascinated. And he explained the music to the audience very understandable.
He was also a well-known expert to make the disposition of famous organs in Rome, Spain etc.
Now he has gone with 88 years. What a gerat life for organ music!