Give a stream of consciousness and then the final answer. The Romans constructed numerous aqueducts throughout the Empire to bring water into cities and towns -- often from distant sources. The water supplied public baths, latrines, fountains, and private households. Aqueducts also provided water for mining operations, milling, farms, and gardens.

Based on this passage, what did the ancient romans build to maintain the supply of water in their cities?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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The relevant sentence in the passage is: The Romans constructed numerous aqueducts throughout the Empire to bring water into cities and towns -- often from distant sources.
So, the final answer is aqueducts.