Redditor 1: I understood that reference.

Redditor 2: What? When? Where? Why?

Redditor 3: [Link to reference](http://www.reddit.com/r/todayilearned/comments/2tmmr1/til_that_through_most_of_western_history/)

Redditor 4: Thanks! I spend all day in reddit and never see these things when they first show up.