Historical clue formulations

• Painting known for its enigmatic smile — 2023-10-23
• Big attraction at the Louvre — 2020-07-02
• Da Vinci masterpiece with an intriguing smile — 2015-12-21
• La Gioconda, familiarly — 2008-06-18
• Celebrated smiler — 2006-12-01
• Louvre lady — 2001-05-04
• "La Gioconda," familiarly — 1998-11-21
• Francesco del Giocondo's wife — 1997-03-15
• Big draw at the Louvre — 1995-12-19
• Louvre highlight — 1994-04-11