Historical clue formulations

• He wrote this many symphonies — 2018-04-19
• Big name in classical education? — 2014-01-17
• "Music should strike fire from the heart of man, and bring tears from the eyes of woman" speaker — 2013-07-19
• Composer of 20-Across — 2011-03-15
• Start of a message on a Lincoln Center T-shirt — 2004-02-25
• He wrote to his "Immortal Beloved" — 2002-10-25