The thirteen desserts (occitan: lei tretze dessèrts) are the traditional dessert foods used in celebrating christmas in the french region of provence. the "big supper" (le gros souper) ends with a ritual 13 desserts, representing jesus christ and the 12 apostles. the desserts always number thirteen but the exact items vary by local or familial tradition. the food traditionally is set out christmas eve and remains on the table three days until december 27.

Source: Wikipedia