Carlo Ignazio Monza's music formed a ballet based on what 18th century play? 
Carlo Ignazio Monza:  Works of his were possibly among the music that formed the basis for the "Pulcinella" score by Igor Stravinsky. Pulcinella (ballet): Pulcinella is a ballet by Igor Stravinsky based on an 18th-century play—Pulcinella is a character originating from Commedia dell'arte.
Commedia dell'arte