[1] While he was performing with Piccolo Teatro as well as teaching in Rome, the American theatre scholar and director Eric Bentley came to Italy to direct the Padua Players company in the first Italian production of Bertolt Brecht.
Then, with Bentley's patronage, Mazzone-Clementi toured the United States in 1958, conducting workshops in mime and commedia, and introducing the leather masks of Amleto Sartori to this country.
In 1972, Mazzone-Clementi and his wife Jane Hill, a graduate of Carnegie-Mellon, went to Humboldt County, California to conduct summer workshops at their rural property.
Often cast for his talents as a mime, he appeared as "The Cock" in the world premiere of Sean O'Casey's Cock-A-Doodle Dandy in New York in 1958.
He performed at a number of International Mime Festivals held in the 1970s and 1980s, and played in Birds of a Feather with the Dell'Arte Company at the 1980 Venice Biennale.