75 years ago, on September 7, 1950, Leonard Bernstein made his first appearance with the Concertgebouworkest, becoming the first American to conduct the ensemble. Bernstein returned to conduct and record with the group - one notable televised event was his conducting of Beethoven’s Missa Solemnis with the Concertgebouw in 1978, his first return since that initial debut. Enjoy this video of Leonard Bernstein conducting the Royal Concertgebouw Orchestra in an excerpt of the Sanctus from Beethoven'