Historical clue formulations

• One of 16 over the course of the Ming dynasty — 2025-05-07
• ___ penguin — 2022-12-01
• Kind of penguin — 2017-10-29
• Caesar or Charlemagne — 2014-07-14
• Tiberius or Charlemagne — 2012-01-16
• 64-Across, for one — 2011-11-23
• Japanese ruler — 2010-04-11
• Napoleon, for one — 2009-02-22
• Montezuma, for one — 2006-09-23
• Maximilian, for one — 2006-01-15
• Kind of penguin — 2000-11-01
• Montezuma, e.g. — 1997-03-21
• Ming the Merciless, e.g. — 1996-12-27
• Type of moth — 1995-12-30