The Versailles-based Orchestre de l’Opéra Royal makes its New York debut under the aegis of the impresario Andrew Ousley’s Death of Classical, a boutique series that has been enlivening the classical scene of late quite remarkably. Snack and sip à la française at the obligatory DOC pre-show reception, then take your seat for a program under the unfortunate, happily misleading heading “The Last Castrato.” Historians of classical singing reserve that label for the Vatican’s Cavaliere Alessandro Moreschi (1958–1922), the lone castrato to have survived into the age of recorded sound, bequeathing to posterity a single ghastly track of the Bach/Gounod “Ave Maria.” The soloist on this occasion is the rich-toned Franco Fagioli, a countertenor in the whizbang contemporary mode, eloquent in long-spun cantabile, fearless in explosive fioritura. Composers include, in order of familiarity, Rossini, Mercadante, Zingarelli, Bonfichi, and unnamed others. Stefan Plewniak conducts. —Matthew Gurewitsch