I find it very hard to read. It seems to be a document of 1426, but I couldn't say more. Don't know if someone can read it here, but you can try at www.tuttogenealogia.it, an italian forum (but you can write English if you want) where you will find the help of experts.
Giuseppe "Pippo" Moccaldi
Certificate requests and genealogical researches in Italy. Translation of your (old) documents and letters. Legal assistance in Italy for your Italian citizenship.