Historical clue formulations

• Maria known as "La Divina" — 2017-01-03
• Leonard Bernstein called her "The Bible of opera" — 2010-08-01
• Maria of the Met — 2007-07-30
• Maria of the Met — 2001-03-12
• Soprano Maria — 1999-03-17
• "Master Class" subject — 1996-02-04
• Soprano Maria — 1995-05-29