Historical clue formulations

• Mr. or Ms. Right — 2025-12-26
• Romantic's quest — 2024-01-13
• Unconditional condition? — 2023-02-04
• One and only — 2020-05-07
• Soul mate — 2019-11-15
• "The Princess Bride" theme — 2016-11-06
• One and only, in romance — 2012-07-16
• Light of one's life — 2010-07-11
• One and only — 2008-01-25
• One and only — 2004-08-06
• Juliet, to Romeo — 2001-08-03