All Super Bowls since V have used Roman numerals, with the exception of 50. The NFL tried out 73 different logos for such a landmark event before finally settling on “50″.

"The Roman numerals were adopted to clarify any confusion that may occur because the NFL championship game — the Super Bowl — is played in the year following a chronologically recorded season.

Roman numerals, a system developed around 500 BC, use letters to represent numbers. The Kansas City Chiefs and Philadelphia Eagles will take the field for Super Bowl LIX on Sunday.