Answer:
C. Colosseum
Step-by-step explanation:
Charlemagne was known for making the empire redundant. Therefore, this resulted in the deteriorating of the relationship that existed in the east as well as the west. This then stayed up to 1054 when the Eastern Church was converted into a Greek orthodox church. It, however, happened after severing all its ties with the Roman Catholic to the Roman Empire.
Therefore, "colosseum" remains is among "oldest buildings" and a "symbol" of the "roman". With "history" of over "2000 history", it explains the "life of the empire of the Romanians".