Why is it that the byzantine empire had a healthy money economy, while in western europe the use of money declined

The Byzantine had a good harbor that was hard to infiltrate. Also, they were a hub of trading.

it took two men to wrestle rome back from chaos and turn a republic into an empire. in the first century bc, rome was a republic. power lay in the hands of the senate, elected by roman citizens. but the senators were fighting for power between themselves.

the united states began searching for a way to reduce oil

-agarvated