 It was at the Met in 1913 that he appeared in the title role of "Boris Godunov" in the American premiere of Mussorgsky's opera.Didur created the roles in three operas by Giacomo Puccini at the Met, "La fanciulla del West" and the "Il tabarro" and "Gianni Schicchi" of the "Il Trittico" trilogy.He also appeared at the world premiere of Humperdinck's "Die Königskinder".