Facts:   - caption: st. paris , a neo-gothic replica of the original statue isabelle at the church of saint-germain l'auxerrois in    - mother: blanche of castile    - death date: 23 february 1270 -lrb- aged 45 -rrb-      - house: house of capet    - father: louis viii of france    - birth date: march 1224    - name: isabelle of france    - image: st. isabel of france saint-germain l'auxerrois . jpg    - death place: longchamp , pays de france , kingdom of france   Based on these bullet points, write a short biography describing the life of isabelle of france -lrb- saint -rrb- .
isabelle of france -lrb- march 1224 -- 23 february 1270 -rrb- was the daughter of louis viii of france and blanche of castile .she was a younger sister of king louis ix of france -lrb- saint louis -rrb- and of alfonso , count of poitiers , and an older sister of king charles i of sicily .in 1256 , she founded the poor clare monastery of longchamp in the part of the forest of rouvray -lrb- now called the bois de boulogne -rrb- , west of paris .she is honored as a saint by the franciscan order .