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This category contains operas, subcategorized by composer, genre, original language, year and acts.

For lists of operas in Wikipedia sorted by title, see List of operas by title. For a chronological list of important operas in Wikipedia, see List of important operas. For a comprehensive list of operas, see List of operas by composer.

For convenience, all operas should be included in this category. This includes all operas that can also be found in the subcategories.