The archival documentation indicates that since 830 there were religious members of the Monastery of the Fathers of Sant'Ambrogio Maggiore present in Cologno and that they were also landowners. The Monastery continued its work in the territory throughout the 9th century through an increase in land holdings, and not only in the local area. In May 859 the Monastery came into possession in Cologno of a "Xenodochium", of a "curtis", and in 892 of a fraction of the chapel of S. Giorgio, a donation by Ariberto which had already taken place at the end of the 8th century. The dominance of the Monastery of S. Ambrogio was definitively consolidated with the construction of the Castle which allowed the monks to exchange building land, and therefore of higher commercial value, with vast extensions of agricultural land. This expansionist policy was extended to other Municipalities so much so that the Monastery reached a very vast territorial power.....