Abstract
The period, from the middle of the fifteenth century, and in particular the fruition of the Franciscan Observance under the leadership of Bernardino of Siena, John of Capistrano and James of the Marches, through the end of the Council of Trent , lasts about a century. It is a century that has recently been the focus of much attention in our research group.2 The hypothesis in this essay is that this century was marked more by continuities than fractures, and in which many problems came to the fore. Therefore, this was a period of instability but also of great vitality:3 “not a starting point, but the climax,” as Paolo Prodi wrote.4The booklet of Paolo Giustiniani and Pietro Quirini, the so-called Libellus ad ..