It's a well-known fact. Many old masters, such as J.S. Bach, Händel, Mozart, Haydn, Durante, Beethoven, or Liszt, all learned and taught keyboard improvisation. Dr. John Mortensen's Improvising Fugue: A Method for Keyboard Artists will greatly contribute to the revival of these skills, once so essential to the art of piano playing.
John J. Mortensen is a leader in the revival of historic improvisation. He is noted for his ability to improvise entire concerts. He frequently teaches and performs internationally. He is the author of The Pianist's Guide to Historic Improvisation, now in use as a course text at many leading conservatories. He is the creator of Improv Planet, an online school of historic improvisation, where his students include concert artists and
conservatory faculty from across the world.