Early middle ages
I think an interesting thing to observe form Islamic influences was that there was still a contrast in idolary art and how Islam was more focused on their place of origins in Mecca, as where Christianity is heavily endowed with images and depictions of holly beings to pay respects and spread the ideas of their religion to the masses. Islam also has no hierarchy in its religious practices as where Christianity has it’s has its ministers and pastors to preach to people.
The original mosque and their Islamic influences before Christians repurposed them I feel like had much more freedom in their style as they were more about the chambers and symbolism of the buildings construction and being able to worship in the correct direction. They then were able to add details with the onto the arches they made, and even add gold Byzantine inspired mosaics to the central domes. As where when the ruling and spreading of Christianity was concerned it was more concerned with the establishment of control. When the mosques were switched to cathedrals under Christian control, I feel the structures mainly lost something, especially since it was a direct disturbance to the ornate structure that was already completed and decorated.
The times of conquering and continual invasion really took their toll on the artistic history of this time, with many structures altered as new religions and regions of control came in, and wither changing or just destroying other religions building was common practice, so much is lost to us that we only have fragments of all the  cultures full achievements.
With so many places competing to spread and conquer though, the methods they devised to bring their belief and traditions with them give us a good snapshot of a lot of the cultures too. Such as in the flat style of an Anglo-Saxon purse and its geometric and gold designs. Then there are also places like the monasteries in Ireland of the Hiberno-Saxon arts that remained as heavens that actually got to develop in to highly trained classical and theological islands. Their scholarly manuscript containing gospels and illuminating illustrations served to show that everything they did was thought out and honed to honor and praise their religion, all of the borders and illustrations and embellishments in their texts held aesthetic and symbolic iconographic meaning.
Then there were also the Carolingian  and Ottoman periods that showed even more growth and craftsmanship in their presentations and teachings. The Carolingian Holy Roman Empire’s cultural revival saw the expansion and networking of monasteries and chapels, and created many laws, libraries, and educational reforms that were meant to reinvent and honor the images of Rome. The importance of Place Chapels, manuscript, and monasteries only increased form there as they were focal points of education and literature that were being brought about, and there were clear centers of control and functionality under the influences of any newly conquered territory. After Carolingian then Otto I still took it upon himself to continue the same style of control then, because of how effective it was when implemented correctly. The ideals of using antiquity styled illustrations and depictions of biblical scenes to spread ideas to mases and reinforce ideals is a largely consumable concept, and became an important and thriving part of creating new art in these eras, and I feel is the reason we are able decipher so much despite there being so much conquering and revival going on.












