The author died in 1924, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 95 years or fewer. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse

The lyrics by Alfano ARE in copyright though. Perhaps rather useless with an aria if no lyrics are used? Who does the research here. just read your own wikipedia-page on Turandot...

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Description Extract from the aria In questa reggia from G. Puccini's opera Turandot
Source: Floréal Molina

I realised this extract from the score myself; nevertheless I'm unsure whether the intellectual content is still subject to copyright. (*Intellectual content is not subject to copyright since the copyright to Puccini's work expired 70 years after his death, according to European Union law.) It consists of a very brief citation which is not a mechanical reproduction of the original printed work…

The end of the extract is truncated by an accented note; the ƒp súbito is, on the other hand, genuine.

Description Extrait de l’aria In questa reggia de l’opéra Turandot de G. Puccini.
Source: Floréal Molina

J’ai moi même réalisé à la main cet extrait de partition, cependant j’ignore si le contenu intellectuel est encore soumis à un quelconque copyright. Il s’agit d’une très brève citation qui n’est pas une reproduction mécanique de l’œuvre imprimée originale…

La fin de l’extrait est tronquée par une note piquée; le ƒp súbito est en revanche d’origine.

Descrizione: Citazione dall’aria In questa reggia dell’opera Turandot di G. Puccini.
Fonte: Floréal Molina

Ho realizzato manualmente questo spezzone di spartito. Tuttavia non so se il contenuto sia tuttora vincolato dai diritti di copia. Trattasi comunque di una brevissima citazione che non è riproduzione meccanica dello stampato originale…

La fine del brano è troncata con una nota staccata; il ƒp súbito, però, è genuino.