Don't forget about the moon landing when homer was sitting in his bean bag singing and eating and not watching it happening. ;
Another more suttle historical reference (or i guess you would call it a artistic reference) is Side Show Bob's prison number-24601. If you don't recgonize that, it's the number that Jean Valjean from the play Les Miserables also wears.
This is not the only time when they used the prison number 24601, Principle Skinner found a helment that he wore when he was caught in Namm

, it had the number 24601 on it,
To quote him 'It's a small world, it really is'

Tomahawk