Historical clue formulations

• Classic theater name — 2025-12-28
• The Blenheim in England, for one — 2025-03-11
• The Alhambra in Spain, for one — 2024-04-19
• Versailles, for one — 2023-08-27
• Grand dwelling — 2020-04-19
• It's fit for a king — 2019-03-23
• State quarters? — 2017-11-24
• France's Élysée, for one — 2011-09-27
• Queen's Guard workplace — 2010-08-11
• See 34-Across — 2009-10-15
• Guard's workplace — 2007-06-20
• Camelot sight — 2006-04-16
• Royal home — 2001-01-29
• Classic theater name — 2000-05-25
• Fairy tale setting — 1999-05-27
• Regal home — 1996-05-27
• Duke's home — 1994-07-04