Historical clue formulations

• Classic work by 16-, 31- and 51-Down, so to speak? — 2018-04-11
• Opera based on a play by Pierre Beaumarchais, with "The" — 2014-04-20
• Rossini opera about Figaro, with "The" — 2011-04-25
• Rome debut of 2/15/1816, with "The" — 2000-01-14
• Opera with the aria "Largo al factotum," with "The" — 1997-07-04
• Rossini opera, with "The" — 1996-12-04
• Rossini opera, with "The" — 1994-10-04