The Orgelbüchlein (Little Organ Book) BWV 599−644 is a collection of 46 chorale preludes for organ written by Johann Sebastian Bach. All but three of them were composed during the period 1708–1717, while Bach was court organist at the ducal court in Weimar.
Happy Birthday to Alfred Brendel (January 5, 1931), Arturo Benedetti Michelangeli (January 5, 1920 – June 12, 1995), Maurizio Pollini (January 5, 1942). Here are three videos featuring them playing Beethoven’s Piano Concerto Emperor.