Historical clue formulations

• The most recent Pope Benedict — 2019-12-08
• Louis ___, French king who was guillotined — 2018-02-20
• Benedict ___ (pope beginning in 2005) — 2011-06-16
• "Sweet" age in ancient Rome? — 2008-04-07
• Last Pope Gregory — 2001-04-10
• Louis who was guillotined — 1997-11-27
• Age at which to get a chariot license? — 1996-01-30