Historical clue formulations

• Play ground? — 2024-02-10
• Playroom? — 2022-04-30
• Domain of "Hamilton" — 2016-08-28
• "The only institution in the world which has been dying for four thousand years," per John Steinbeck — 2015-01-17
• Play ground? — 2006-11-01
• It has wings but can't fly — 2004-11-26
• It may be political — 2004-08-01
• It may have a big bill — 2000-11-11