Well no, the 13th century means the years of 1200-1299 and not the 1400s; And as i said before the most contemporary picture should be chosen due it being the most valid; There is a picture (fresco) of St. Francis in Subiaco which is contemporary in terms of life-time (his time of refuge there) which would be even better; Other than that i can only recommend to use the most contemporary picture of any saint for any saint instead of a 'hundred years' later imaginary projection; A good example would be St. Ambrose on wiki; Thus my vote goes to St. Francis and scenes from his life 13th century Bardi or the fresco at/from Subiaco; Thats my two sesterces;