Hereditary Grand Duke Guillaume signs his son’s birth certificate with Mayor Lydie Polfer as a witness. Photo: © Cour grand-ducale / Sophie Margue

Hereditary Grand Duke Guillaume at Luxembourg City Town Hall to sign the birth certificate of HRH Prince Charles, with Mayor Lydie Polfer as a witness, 13 May 2020. Photo: © Cour grand-ducale / Sophie Margue

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