During the 5th century, Verona was occupied by the Ostrogoth Theodoric I, later by the Lombards, and in 774 by Charlemagne. IntegrityThe historic city of Verona today contains elements representing its 2,000 year history: the Roman period, Romanesque, Middle Ages and Renaissance which have survived intact until the 19th century. The walls surrounding the city prevented 19th century development such as industry and railroads within the historic city. AuthenticityThe authenticity of the City of Verona is high. An important role is also played by the Diocese of Verona – Cultural Heritage Office, the institution in charge of the Catholic Church Heritage management on behalf of the Ecclesiastical Institution.