Which answer matches this clue: the multidisciplinary arts festival founded in Spoleto in 1958 by Gian Carlo Menotti?

• A Ravenna Festival
• B Festival dei Due Mondi ✓
• C Macerata Opera Festival
• D Mittelfest

The Festival dei Due Mondi (Festival of Two Worlds) was conceived by composer Menotti as a transatlantic cultural bridge with its sister festival in Charleston.