Answer:
the other person's link is the correct answer to your question
The main reason is that city states were becoming increasingly wealthy
The nation was not unified and every city was a state for itself. This meant that they didn't have to think about the rest of the land and they focused on trading and getting richer and richer. The rich lords and ladies liked art and employed numerous artists to do commission work or to make the state a better place or similar things.
Answer: While c. 476 CE is the traditionally accepted date for the end of the Western Roman Empire, that entity did continue on under the rule of Odoacer (r. 476-493 CE) who, officially anyway, was simply ruling in place of the deposed emperor Julius Nepos (who had been deposed by the general Orestes who had placed his son, Romulus Augustulus, on the throne).
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