Criterion (ii): The Longobard monuments are an exemplary testimony to the cultural and artistic synthesis that occurred in Italy in the 6th to the 8th centuries, between the Roman heritage, Christian spirituality, Byzantine influence and the values derived from the Germanic world. They paved the way for and heralded the flowering of Carolingian culture and artistry.
Criterion (iii): The Longobard places of power express remarkable new artistic and monumental forms, testifying to a Longobard culture characteristic of the European High Middle Ages. It takes the form of a clearly identifiable and unique cultural ensemble, the many languages and objectives of which express the power of the Longobard elite.
Criterion (vi): The place of the Longobards and their heritage in the spiritual and cultural structures of Medieval European Christianity is very important. They considerably reinforced the monastic movement and contributed to the establishment of a forerunner venue for the great pilgrimages, in Monte S.Angelo, with the spread of the worship of St. Michael. They also played an important role in the transmission of literary, technical, architectural, scientific, historical and legal works from Antiquity to the nascent European world.