The flag of the University displays the school's
shield and motto. The open book is inscribed with "Vet.
Nov. Testamentum" (Old and New Testament). The motto, "Dei
Sub Numine Viget," translates as "Under the Protection
of God She Flourishes."
of the flag stands for William III of Orange, Prince
of Nassau, and King of England. Black was first used as Princeton's
1867, when the sophomore baseball team used black ink
to write class numerals on their orange ribbons.