The tune is Bach's "Jesu, Joy of Mans Desiring" Below is a link to the history of its composition. Jesu, Joy of Man's Desiring - Wikipedia, the free encyclopedia
Goosebumps for me every time. Spectacular! Thank you for sharing this.. "It had been a wonderful evening and what I needed now, to give it the perfect ending, was a little of the Ludwig Van." Alex, A Clockwork Orange.