Complex sentence: The corn-growers and the revenue collectors were ruined by exorbitant imposts or by the iniquitous cancelling of contracts; temples and private houses were robbed of their works of art; and the rights of Roman citizens were disregarded.
Split into simpler sentences: The corn-growers and the revenue collectors were ruined by exorbitant imposts or by the iniquitous cancelling of contracts. Temples and private houses were robbed of their works of art and the rights of Roman citizens were disregarded.