The new exhibition at the Legion of Honor Museum, “The Etruscans: From the Heart of Ancient Italy,” which opened May 2 and continues through Sept. 20, seeks to enlighten curious visitors on the innovative and artistic contributions of the largely overlooked Etruscans, an indigenous society with a one-off language, who thrived in the central Italy peninsula from the ninth century to the first century B.C., in the period preceding the Roman Empire.