Answer:
Greek architecture was one important influence on the Romans. As you remember, the Greeks built marble temples as homes for their gods. Temples like the Parthenon had stately columns that added to their beauty. The Romans used Greek designs in their own public buildings.
Etruscan influence on ancient Roman culture was profound and it was from the Etruscans that the Romans inherited many of their own cultural and artistic traditions, from the spectacle of gladiatorial combat, to hydraulic engineering, temple design, and religious ritual, among many other things.