Leonard Cohen

During one of my visits to the Research Institute for Mathematics (MFO) in Oberwolfach I stumbled upon a Steinway grand piano hidden in a remote room in the basement. I couldn't resist the urge to hammer on this masterpiece of musical hardware (those who know the itch in the fingertips and the magical attraction of the ebonies and the ivories will certainly understand me.) I played a lot that day, forsaking perhaps some of the talks. One of the pieces happened to be Leonard Cohen's Hallelujah (unfortunately, the quality of the sound in the video is even worse than the quality of my playing.) This song was written in 1984 and (surprisingly!) had little initial success; with the years it has become hugely popular with some 300 interpretations (with different lyrics) existing today.