The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The art and architecture in the provincial capitals of Ravenna and Thessaloniki continue imperial Roman conventions in that they followed the architectonic styles of the Western Roman Empire. When emperor Constantine decided to move to Constantinople(modern-day Turkey) the capital of the Roman Empire, he was not only establishing the foundation of the Eastern Roman Empire, later known as the Byzantine Empire. He also took the artistic elements that characterized Roman architecture and implemented these styles in Constantinople.
So architecture in Ravenna, Italy, and Thessaloniki, Greece, influenced further Christian structures.