When did the cultural unity of the Mediterranean break?

the widespread Islamization and the settlement innorth Africa of tribes originating in Arabia occured a total cultural change, making these lands totally foreign to the ancient classical culture.The same happened even in south Spain. <img alt="" src="https://miro.medium.com/v2/resize:fit:427/0*djd1nytMupnv9nAu" style="height:327px; width:474px" /> Battle of Poitiers. The Muslim advance into the heart of Europe is stopped by the Franks. In the West, with the imperial coronation of Charlemagne and the increasing distance between the Roman church and the church of Constantinople, cultural differences are accentuating. <a href="https://medium.com/@tiosimpa/when-does-the-cultural-unity-of-the-mediterranean-break-2a98149c8819">Website</a>