Contrary to Lombard kings, the Frank reigning families were particularly linked to the Catholic Church of Rome. From the ninth to the twelfth century, the occidental monasticism - begun in the sixth century with Benedict from Norcia, who wrote the Benedictine Rule - spread  across Europe and produced such cultural influences till becoming the foundation of European civilization. In that period Capiate became a monastic feud under the imperial authorities.

The Monastery of St. Ambrose of Milan, implementing Benedictine Rule, obtained the possessions of Capiate, Villa Capiate, Greghentino and Miglianico. It happened between March and May 835. For five centuries, popes and emperors confirmed those possessions to the Monastery (the list below summarizes the acts and other documents related to Capiate. They are parchments kept in the State Archives of Milan).

AD 835                       Act of confirmation by Emperor Lothair

21 March 880              Act of confirmation by Emperor Charles III the Fat

21 March 880 bis         Act of confirmation by Emperor Charles III the Fat

30 March 880              Act of confirmation by Emperor Charles III the Fat

AD 885                       Donation by the minter Ambrosius

AD 893                       List of the Monastery's possessions

AD 951                       Act of confirmation by Emperor Otto I 

AD 998                       Act of confirmation by Pope Gregory V

AD 1028                     Donation by Archbishop Aribertus Intimiano

AD 1102                     Act of confirmation by Pope Paschal II

AD 1110                     Act of confirmation by Emperor Henry V

AD 1185                     Act of confirmation by Emperor Frederick I

AD 1193                     Act of privilege by Archbishop Milo

AD 1196                     Act of confirmation by Emperor Henry VI

AD 1210                     Act of confirmation by Emperor Otto IV

AD 1251                     Act of confirmation by Pope Innocent IV

Capiate was one among the first nine possessions of the Monastery. As all the others, the property of Capiate was carefully managed and made more profitable. There was also placed a monastic cell where few members of the religious community lived. This cell was closed before A.D. 1028, as a document dates from that year attests.

The Basilica of St. Nazaro was built in Lombard Times, before the acquisition of the Monastery. For many centuries, it was heart of the religious life. Nowadays, we still can see important parts of that medieval church.

The parchments of the Monastery testify that grapevine was cultivated in Capiate. Such cultivation lasted until the nineteenth century.

The jurisdiction of the Monastery lasted until about A.D. 1310, when the Della Torre family bought all the properties that the Monastery owned in the valley. of the Adda river.