Original: Until 2007 , administratively , the whole island of Saint-Barthélemy was a French commune ( commune de Saint-Barthélemy ) part of Guadeloupe , which is an overseas région and overseas département of France , and therefore part of the European Union .
Simplified: Administratively , the whole island of Saint-Barthélemy was a French copmmune ( commune de Saint-Barthélemy ) . It was part of Guadeloupe , which is an overseas région and overseas département of France .