Howard Hibbard, Bernini Other historians have provided differed on this number, but Wittkower confirms 20 to be an overstatement, Wittkower, Bernini’s Bust of Louis XIV, 1951, p6, n1
doi.org
Desmas, Anne-Lise (2009). "In Search of Marble in Paris for Gian Lorenzo Bernini's Bust of Louis XIV: A Letter from Charles Perrault to Jean-Baptiste Colbert". Getty Research Journal. 1 (1): 169–178. doi:10.1086/grj.1.23005374. JSTOR23005374. S2CID193481119.
Zarucchi, Jeanne (Winter 2006). "Bernini and Louis Xiv: A Duel of Egos". Source: Notes in the History of Art. 25 No. (2): 32–38. doi:10.1086/sou.25.2.23208102. S2CID191405674 – via JSTOr.
jstor.org
Desmas, Anne-Lise (2009). "In Search of Marble in Paris for Gian Lorenzo Bernini's Bust of Louis XIV: A Letter from Charles Perrault to Jean-Baptiste Colbert". Getty Research Journal. 1 (1): 169–178. doi:10.1086/grj.1.23005374. JSTOR23005374. S2CID193481119.
semanticscholar.org
api.semanticscholar.org
Desmas, Anne-Lise (2009). "In Search of Marble in Paris for Gian Lorenzo Bernini's Bust of Louis XIV: A Letter from Charles Perrault to Jean-Baptiste Colbert". Getty Research Journal. 1 (1): 169–178. doi:10.1086/grj.1.23005374. JSTOR23005374. S2CID193481119.
Zarucchi, Jeanne (Winter 2006). "Bernini and Louis Xiv: A Duel of Egos". Source: Notes in the History of Art. 25 No. (2): 32–38. doi:10.1086/sou.25.2.23208102. S2CID191405674 – via JSTOr.