Don Carlo: C Majors Tutto Verdi project comes to one of Verdis most popular operas: Don Carlo. Based on Schiller's play of the same name, Don Carlos was written for the Paris Opéra in 1865-66 in the tradition of a French grand opera. Repeatedly revised and performed in Italian as Don Carlo, the opera is seen here in the version that Verdi prepared for Modena in 1886. In many respects, this is Verdi's most ambitious and most forward-looking work.