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Christoph Willibald Gluck Il Parnaso confuso titlepage of the libretto Vienna . en Christoph Willibald Gluck Il Parnaso confuso titlepage of the libretto Vienna google de vid IBNR CR Pietro Metastasio Christoph Willibald Gluck other versions PDold Uploaded with Il Parnaso confuso Christoph Willibald Gluck