"... she was gentle, shy, somewhat sentimental, and preferred retirement to courtly pomp. Her education had been admirably cultivated; she was accomplished, and her modest and dignified deportment offered a pleasant contrast to the coquettish allurements of many of Anne's [der Königin und Regentin von Frankreich] noble French maidens." (in: Martha Walker Freer: The Regency of Anna of Austria - Queen Regent of France, Mother of Louis XIV, From numerous unpublished sources, including M88. in the Bibliothèque Impériale, and the Archives du Royaume de France, etc., etc., Vol. 2, id., p. 161).
Laura Victoria Mancini wurde am 28. Juli 1651 mit Louis (1612-1669), dem Herzog von Mercœur und späteren zweiten Herzog von Vendôme, verheiratet [in: Martha Walker Freer: The Regency of Anna of Austria - Queen Regent of France, Mother of Louis XIV, From numerous unpublished sources, including M88. in the Bibliothèque Impériale, and the Archives du Royaume de France, etc., etc., Vol. 2, id., p. 435; am 4. Februar 1651 war die Verlobung der beiden], dem sie drei Söhne schenkte: 1. den Sohn Louis Joseph (1654-1712), 2. den Sohn Philippe (1655-1727) und 3. den Sohn Jules César (1657-1660). Sie starb nur 11 Tage nach der sehr schweren Geburt ihres dritten Sohnes im Alter von 23 Jahren. Ihr Gatte zog sich nach ihrem Tod aus dem weltlichen Leben zurück und wurde Geistlicher. Er stieg zum Kardinal und schließlich zum päpstlichen Legaten von Frankreich auf.
Von ihrer Zeitgenossin Madame de Motteville erfahren wir etwas über ihren Tod: "She was pregnant at the time [im Jahr 1657, gerade als ihre Mutter gestorben war, was sie sehr mitnahm], and shortly after, having been safely delivered, she died suddenly without giving time to those who were caring for her life to apprehend her death. She had been delivered a few days when, suddenly, half her body became paralyzed and she lost speech. The cardinal [Kardinal Mazarin], her uncle, was not anxious at the moment, because the doctors assured him she was doing well. For this reason he had gone to a ballet in which the king [Ludwig XIV.] was dancing that day. As he left it, they brought him word that Madame de Mercœur was much worse. He hastened to her at once, flinging himself into the first carriage he could find. On arriving at the hôtel de Vendôme he found she was dying, and being unable to speak she could only smile to him. She died on the 8th of February, deeply regretted by all her nearest friends and by the whole Court, for virtue and beauty attract the good feelings of men." (in: Memoirs of Madame de Motteville, Volume 3, id., p. 113).