The Festival dei Due Mondi (Festival of the Two Worlds) is an annual summer music and opera festival held each June to early July in Spoleto, Italy, since its founding by composer Gian Carlo Menotti in 1958.
The "Two Worlds" in the name of the festival comes from Gian Carlo Menotti's intention to have the worlds of American and European culture facing each other in his event; this concept would then be strengthened by the fact that it was held in conjunction with its "twin", the Spoleto Festival USA held annually in May/June in Charleston, South Carolina. That twinning lasted some 15 years.
The festival features a vast array of concerts, opera, dance, drama, visual arts and roundtable discussions on science and concludes with the traditional concert in Piazza del Duomo, in which, year after year, perfom the largest and prestigiuos philharmonic orchestras in the world.
Here the programme https://www.festivaldispoleto.com/en