Solid gold workmanship and other metal ornaments and tools showed a Greek influence, but the Etruscans' vaulted architecture, town planning, and irrigation systems were indigenous.
The Etruscans had irrigation systems that were influenced by the Greeks.
mnli hypothesis: The Etruscans had irrigation systems that were influenced by the Greeks. premise: Solid gold workmanship and other metal ornaments and tools showed a Greek influence, but the Etruscans' vaulted architecture, town planning, and irrigation systems were indigenous.