Unlike English, French assigns masculine and feminine genders to nouns.  In most cases this is pretty straightforward.  However in the case of “Franche-Comté”, today this name is masculine.  And today the word “Comté” is feminine.  But historically “Franche-Comté” used to be feminine.  When exactly the name changed genders hundreds of years ago no one is sure.  But inside and out, this area is one of the most underrated and beautiful in France.