Historical clue formulations

• "Psycho" psycho — 2022-05-27
• Invader of 1066 — 2014-05-25
• Invader of 1066 — 2011-11-06
• Oklahoma city — 2011-05-08
• See 48-Across — 2010-07-23
• With 89-Down, historic part of NW Europe — 2007-10-28
• Rouen resident, e.g. — 2005-09-09
• Conqueror of 1066 England — 2005-04-11
• 11th-century conqueror — 2004-06-27
• "Psycho" psycho — 2001-09-03
• Conqueror of England, 1066 — 2000-06-20
• Bates of "Psycho" — 1998-12-08
• Saxon's foe — 1996-11-17
• Greg of golf — 1995-01-08
• Oklahoma city — 1994-11-27