Add Yahoo as a preferred source to see more of our stories on Google. The Kansas City Chiefs and Philadelphia Eagles will take the field for Super Bowl LIX on Sunday. But many football fanatics and casual watchers may be wondering: What the heck does LIX mean?

The Roman Empire might've fallen, but it didn't take their numbers down with it. Those pesky letters disguised as numbers still stick around to this day, normally wreaking havoc on people that just want to know what number Super Bowl we're up to.

(WHTM) — The Eagles are headed to Super Bowl LIX. But, you may have wondered, why isn’t it just Super Bowl 59? Bob Moore, historian for the Kansas City Chiefs told the Associated Press in 2012, “the Roman numerals made it much more important.”