Salvator Mundi (Leonardo)

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Salvator Mundi
English: Savior of the World
See adjacent text.
ArtistLeonardo da Vinci
Yearc.1500
TypeOil on walnut
Dimensions45.4 cm × 65.6 cm (25.8 in × 19.2 in)
ConditionRestored

Salvator Mundi is a painting of Christ as Salvator Mundi (Latin for Savior of the World) by Leonardo da Vinci, dated to c. 1500. The painting shows Jesus, in Renaissance dress, giving a benediction with his raised right hand and crossed fingers while holding a transparent rock crystal orb in his left hand, signaling his role as savior of the world and master of the cosmos, and representing the 'crystalline sphere' of the heavens, as it was perceived during the Renaissance.[1][2] Around 20 other versions of the work are known, by students and followers of Leonardo. Preparatory chalk and ink drawings of the drapery by Leonardo are held in the Royal Collection.

Long thought to be a copy of a lost original, veiled with overpainting, it was restored, rediscovered, and included in a major Leonardo exhibition at the National Gallery, London, in 2011–12. Although several leading scholars consider it to be an original work by Leonardo da Vinci,[3] this attribution has been disputed by other specialists.[4]

It is one of fewer than 20 known works by da Vinci, and was the only one to remain in private hands. It was sold at auction by Christie's in New York, on 15 November 2017, for $450.3 million to Saudi prince Bader bin Abdullah bin Mohammed bin Farhan al-Saud, setting a new record for most expensive painting ever sold.

History

Leonardo da Vinci, c.1500, Salvator Mundi (framed)

Leonardo da Vinci's Salvator Mundi may have been painted for Louis XII of France and his consort, Anne of Brittany.[5] It was probably commissioned around 1500, shortly after Louis conquered the Duchy of Milan and took control of Genoa in the Second Italian War. Leonardo himself moved from Milan to Florence in 1500.[6][7]

It may have come to England with Henrietta Maria when she married Charles I of England in 1625, and it seems to have remained in her private chambers at the Queen's House in Greenwich. Wenceslaus Hollar made an engraving of the painting, published in Antwerp in 1650 with the inscription Leonardus da Vinci pinxit (Latin for 'Leonardo da Vinci painted it').[6]

Charles I was executed in 1649 at the end of the English Civil War, and the painting was included in a 1649 inventory of the Royal Collection, valued at £30. Charles’s possessions were sold under the English Commonwealth, and the painting was sold in 1651 to John Stone, a mason, to settle a debt, but it was returned to Charles II of England after the English Restoration in 1660, and included in an inventory of Charles’s possessions at the Palace of Whitehall in 1666. It was inherited by James II of England and may then have passed to his mistress Catherine Sedley, Countess of Dorchester, whose illegitimate daughter with James became the third wife of John Sheffield, 1st Duke of Buckingham and Normanby. His own illegitimate son, Sir Charles Herbert Sheffield, 1st Baronet, auctioned the painting in 1763 along with other artworks from Buckingham House, when the building was sold to George III.

The painting then disappeared from the records until it was bought by a British collector, Francis Cook, 1st Viscount of Monserrate, in 1900, for his collection at Doughty House in Richmond. The painting was damaged from previous restoration attempts, and has been attributed to a follower of Leonardo, Bernardino Luini. Cook's great grandson, Sir Francis Cook, 4th Baronet, sold it at auction in 1958 for £45,[2] as a work by Leonardo's pupil Giovanni Antonio Boltraffio.[8] The painting remained attributed to Boltraffio until 2011.[8]

Rediscovery and restoration

In 2005, the painting was acquired for less than $10,000 (€8,450) at an auction in New Orleans by a consortium of art dealers that included Robert Simon, a specialist in Old Masters.[9][10] It had been heavily overpainted so it looked like a copy, and was, before restoration, described as "a wreck, dark and gloomy".[11]

The consortium believed there was a possibility that the low quality mess (with its excessive overpainting) might actually be the long missing da Vinci original. They spent the next few years having the painting restored by Dianne Dwyer Modestini at New York University and authenticated as a painting by Leonardo.[10][11] From November 2011 through February 2012, the painting was exhibited at the National Gallery as a work by Leonardo da Vinci.[10][12] The last Leonardo to be discovered was the Benois Madonna, found in 1909.[13]

In May 2013, the Swiss dealer Yves Bouvier purchased the painting for just over US$75 million (in a private sale brokered by Sotheby’s, New York). The painting was then sold to Russian collector Dmitry Rybolovlev for US$127.5 million.[14][15][16] This sale—along with several other sales Bouvier made to Rybolovlev—created a legal dispute between Rybolovlev and Bouvier.[17]

It was exhibited in Hong Kong, London, San Francisco and New York in 2017, and then sold at auction at Christie's in New York in November 2017 for $450,312,500, a new record price for an artwork (hammer price $400 million plus $50.3 million in fees).[18][19] The purchaser was not disclosed.[20][21] The highest price previously paid for an artwork at auction was for Pablo Picasso's Les Femmes d'Alger, which sold for $179.4 million in May 2015 at Christie's New York. Willem de Kooning's Interchange was purchased privately for $300 million in September 2015 by the David Geffen Foundation to hedge fund manager Kenneth C. Griffin; formerly the highest known sale price for any artwork.[22][23][24]

Attribution

Salvator Mundi (black and white photograph c.1908-10) before restoration
Salvator Mundi after restoration

In 2011, by consensus decision, facilitated by National Gallery director Nicholas Penny, the attribution of Leonardo da Vinci was confirmed.[8] By July 2011, separate press release documents were issued by the owners' publicity representative and the National Gallery, officially announcing the "new discovery".[8][25]

Once it was cleaned and restored, the painting was compared with, and found superior to, twenty other versions of Salvator Mundi. It was exhibited by London's National Gallery during the Leonardo da Vinci: Painter at the Court of Milan from November 2011 to February 2012.[6][11][26][27] Several features in the painting have led to the positive attribution: a number of pentimenti are evident, most notably the position of the right thumb. The sfumato effect of the face—evidently achieved in part by manipulating the paint using the heel of the hand—is typical of many Leonardo works.[28] The way the ringlets of hair and the knotwork across the stole have been handled is also seen as indicative of Leonardo's style. Furthermore, the pigments and the walnut panel upon which the work was executed are consistent with other Leonardo paintings.[29] Additionally, the hands in the painting are very detailed, something that Leonardo is known for: he would dissect the limbs of the deceased in order to study them and render body parts in an extremely lifelike manner.[30]

One of the world's leading Leonardo experts, Martin Kemp,[31][32] who helped authenticate the work, said that he knew immediately upon first viewing the restored painting that it was the work of Leonardo: "It had that kind of presence that Leonardos have ... that uncanny strangeness that the later Leonardo paintings manifest." Of the better-preserved parts, such as the hair, Kemp notes: "It's got that kind of uncanny vortex, as if the hair is a living, moving substance, or like water, which is what Leonardo said hair was like."[28]

Martin Kemp writes:

However skilled Leonardo's followers and imitators might have been, none of them reached out into such realms of "philosophical and subtle speculation". We cannot reasonably doubt that here, we are in the presence of the painter from Vinci.[33]

Walter Isaacson in his biography of Leonardo wrote that the orb that Christ is holding does not correspond to the way an orb would realistically look:

In one respect, it is rendered with beautiful scientific precision, but Leonardo failed to paint the distortion that would occur when looking through a solid clear orb at objects that are not touching the orb. Solid glass or crystal, whether shaped like an orb or a lens, produces magnified, inverted, and reversed images. Instead, Leonardo painted the orb as if it were a hollow glass bubble that does not refract or distort the light passing through it.[34]

Isaacson believes that this was "a conscious decision on Leonardo's part",[35] and speculates that either Leonardo felt a more accurate portrayal would be distracting, or "he was subtly trying to impart a miraculous quality to Christ and his orb".[34]

Detail of the left hand and crystal orb

Kemp, on the other hand, says the doubled outline of the heel of the hand holding the sphere—which the restorer described as a pentimento—is an accurate rendering of the refraction produced by a calcite (or rock crystal) sphere.[28] Kemp further notes evidence supporting the solid nature of the orb, citing "sparkles with a series of internal inclusions (or pockets of air)" visible in 'within' the orb.[1] Kemp notes the double refraction is typical of the type produced by a transparent calcite sphere. None of the copyists had likely noticed or reproduced this crystalline orb with a double refraction.[28]

Other versions or copies of Salvator Mundi often portray a brass, solid spherical orb, terrestrial globe, or globus cruciger. Occasionally, they appear to be made of translucent glass, or show landscapes within them. Leonardo's painting, Kemp says, has "an amazing series of glistening little apertures—they're like bubbles, but they're not round—painted very delicately, with just a touch of impasto, a touch of dark, and these little sort of glistening things, particularly around the part where you get the back reflections." These are the characteristic features of rock crystal. Leonardo was an avid expert on rock crystal. He had been asked to evaluate vases that Isabella d'Este had thought of purchasing, and greatly admired the properties of the mineral.[28] (Isabella d’Este has been proposed as a plausible candidate for the subject of Leonardo’s Mona Lisa).[36]

Iconographically, the crystal sphere relates to the heavens. In Ptolemaic cosmology, the stars were embedded in a fixed celestial crystalline sphere (composed of aether), with the spherical Earth at the center of the universe. "So what you've got in the Salvator Mundi", Kemp states, "is really "a savior of the cosmos", and this is a very Leonardesque transformation."[28]

Leonardo da Vinci, Paris Manuscript D, 1508–09[37]

Another aspect of Leonardo's painting Kemp studied was depth of field, or shallow focus. Christ's blessing hand appears to be in sharp focus, whereas his face—though altered or damaged to some extent—is in soft focus. Leonardo's Manuscript D of 1508–1509,[38] explored theories of vision, optics of the eye, and theories relating to shadow, light and color. In Salvator Mundi, the artist deliberately placed an emphasis on parts of the picture over others. Elements in the foreground are seen with a sense of focus, while elements further removed are barely in focus, such as the subjects face. Manuscript D shows Leonardo was investigating this particular phenomenon around the turn of the century. Combined, the intellectual aspects, optical aspects, and the use of semi-precious minerals, are distinctive of Leonardo's oeuvres.[28]

"There is extraordinary consensus it is by Leonardo," said the former co-chairman of old master paintings at Christie's, Nicholas Hall: "This is the most important old master painting to have been sold at auction in my lifetime."[39]

Christie's listed the ways scholars confirmed the attribution to Leonardo da Vinci:

The reasons for the unusually uniform scholarly consensus that the painting is an autograph work by Leonardo are several, including the previously mentioned relationship of the painting to the two autograph preparatory drawings in Windsor Castle; its correspondence to the composition of the ‘Salvator Mundi’ documented in Wenceslaus Hollar’s etching of 1650; and its manifest superiority to the more than 20 known painted versions of the composition.

Furthermore, the extraordinary quality of the picture, especially evident in its best-preserved areas, and its close adherence in style to Leonardo’s known paintings from circa 1500, solidifies this consensus.[6][40]

Details and studies

Reception

The rediscovered painting by Leonardo generated considerable interest within the media and general public amid its pre-auction viewings in Hong Kong, London, San Francisco and New York. Over 27,000 people saw the work in person before the auction: the highest number of pre-sale viewers for an individual work of art, according to Christie's.[42] Never before had Christie’s used an outside agency to advertise an artwork. Around 4,500 stood in line to preview the work in New York the weekend prior to the sale. Emotions were heightened as observers stood in front of the painting.[42]

Celebrities Leonardo DiCaprio, Alex Rodriguez, Patti Smith and Jennifer Lopez were among the visitors to see the so-called "Last da Vinci": the only known painting by Leonardo still in private hands. Fewer than twenty other known works by Leonardo are held in museums around the world, including the Mona Lisa and The Last Supper. The only work by da Vinci in North America, Ginevra de' Benci, is held at the National Gallery of Art in Washington, D.C.[42] The museum purchased Ginevra in 1967 for $5 million in a private sale (equivalent to approximately $36.4 million in 2017), a world record at the time. Salvator Mundi is the first painting by the artist to appear in a public sale for 100 years.[42]

Leonardo da Vinci, Mona Lisa (c.1503–06), Louvre, Paris

Yet, there are some respected experts on Renaissance art[42] who question the attribution of the painting to Leonardo.[35][43] Jacques Franck, a Paris-based art historian and Leonardo specialist, who has studied the Mona Lisa out of the frame multiple times, stated: "The composition doesn't come from Leonardo, he preferred twisted movement. It's a good studio work with a little Leonardo at best, and it’s very damaged. It’s been called 'the male Mona Lisa', but it doesn't look like it at all."[39]

Michael Daley, the director of ArtWatch UK, raised doubts on the authenticity of the painting.[44][45] He noted that there is practically no evidence that proves that Leonardo was ever involved in painting a Salvator Mundi subject. This disputes the important argument in favor of attributing the painting to Leonardo, namely that the painting contains pentimenti and for that reason has to be attributed to Leonardo himself.[44][46] Daley notes on the Salvator Mundi painting being the prototype of a subject painted by Leonardo: "This quest for an autograph prototype Leonardo painting might seem moot or vain: not only do the two drapery studies comprise the only accepted Leonardo material that might be associated with the group,[41] but within the Leonardo literature there is no documentary record of the artist ever having been involved in such a painting project."[44]

Dr. Carmen Bambach, specialist in Italian Renaissance art at the Metropolitan Museum of Art, questioned full attribution to Leonardo: "having studied and followed the picture during its conservation treatment, and seeing it in context in the [National Gallery] exhibition, much of the original painting surface may be by Boltraffio, but with passages done by Leonardo himself, namely Christ's proper right blessing hand, portions of the sleeve, his left hand and the crystal orb he holds."[47][48]

Professor Charles Hope, art historian, writes: "I’m not a believer that this is a real Leonardo... I think it’s exceptionally boring, and when you see it hanging next to some real Leonardos, it doesn’t look good. Frankly, I think the claim that it’s a Leonardo is ridiculous. Nobody in their right mind would think it was. The world is filled with near-Leonardos."[47][49]

Absent from Christie’s list of experts contributing to consensus on attribution is Frank Zöllner, the author of the catalogue raisonné Leonardo da Vinci. The Complete Paintings and Drawings.[50] In the revised 2017 edition, Zöllner writes of Salvator Mundi that its quality surpasses other known versions, however, it:

also exhibits a number of weaknesses. The flesh tones of the blessing hand, for example, appear pallid and waxen as in a number of workshop paintings. Christ’s ringlets also seem to me too schematic in their execution, the larger drapery folds too undifferentiated, especially on the right-hand side. [...] It will probably only be possible to arrive at a more informed verdict on this question after the results of the painting's technical analyses have been published in full (Dalivalle/Kemp/Simon 2017).[44][50]

In the preface, Zöllner writes:

This attribution is controversial primarily on two grounds. Firstly, the badly damaged painting had to undergo very extensive restoration, which makes its original quality extremely difficult to assess. Secondly, the Salvator Mundi in its present state exhibits a strongly developed sfumato technique that corresponds more closely to the manner of a talented Leonardo pupil active in the 1520s than to the style of the master himself. The way in which the painting was placed on the market also gave rise to concern.[44][50]

The results of the painting’s technical analyses by Dalivalle/Kemp/Simon is scheduled to be released in 2018.[44]

Copies or other versions

Possibly influenced

See also

References

  1. ^ a b Martin Kemp, Christ to Coke: How Image Becomes Icon, Oxford University Press (OPU), 2012, p. 37, ISBN 0199581118
  2. ^ a b c d e "Video: The Last da Vinci – Christie's". Christies.com. Retrieved 16 November 2017.
  3. ^ Hartley-Parkinson, Richard (16 November 2017). "Leonardo Da Vinci portrait of Jesus Christ 'Salvator Mundi' sells for $450,000,000". metro.co.uk.
  4. ^ "Mystery over Christ's orb in $100m Leonardo da Vinci painting". The Guardian. 19 October 2017.
  5. ^ "Salvator Mundi". Christie's. Retrieved 27 November 2017.
  6. ^ a b c d "Salvator Mundi — The rediscovery of a masterpiece: Chronology, conservation, and authentication – Christie's'". Christies.com. Retrieved 16 November 2017.
  7. ^ correspondent, Mark Brown Arts (10 October 2017). "Only Leonardo da Vinci in private hands set to fetch £75m at auction". theguardian.com. Retrieved 16 November 2017.
  8. ^ a b c d e f H. Niyazi, "Platonic receptacles, Leonardo and the Salvator Mundi", iconographic and provenance details of the painting, 18 July 2011
  9. ^ Lost Leonardo painting had tangled path to $450 million sale, LA Times, 16 November 2017
  10. ^ a b c Greene, Kerima (19 November 2017). "An art dealer explains how a da Vinci went from less than $200 to breaking the bank at $450M". CNBC. Retrieved 20 November 2017.
  11. ^ a b c Esterow, Milton (June 2011). "A Long Lost Leonardo". ARTnews. Retrieved 30 June 2011.
  12. ^ Leonardo da Vinci, Painter at the Court of Milan, Leonardo da Vinci, Christ as Salvator Mundi, exhibition catalogue, n.71, National Gallery, 9 November 2011–5 February 2012
  13. ^ Travis M. Andrews and Fred Barbash, "Long-lost da Vinci painting fetches $450.3 million, an auction record for art", The Washington Post, 16 November 2017
  14. ^ Reyburn, Scott (3 March 2014). "Recently Attributed Leonardo Painting Was Sold Privately for Over $75 Million". The New York Times. Retrieved 16 November 2017. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
  15. ^ Grosvenor, Bendor. "Salvator Mundi at heart of art fraud case". arthistory.com. Bendor Grosvenor. Retrieved 12 March 2015.
  16. ^ Clémençon, Gilles. Accusé d'escroquerie, le "roi des ports francs" Yves Bouvier riposte. RTS Info. 22 March 2015 (French)
  17. ^ Sam Knight, "The Bouvier Affair, How an art-world insider made a fortune by being discreet" The New Yorker, 8 & 15 February 2016
  18. ^ "Post-War & Contemporary Art Evening Sale Lot 9B". Auction Catalog (Results). Christie's Auction House. 15 November 2017. Retrieved 16 November 2017.
  19. ^ Angel Au-Yeung, At Auction, Billionaire Sells Da Vinci Painting For A New World Record Price, Forbes.com, 15 November 2017
  20. ^ "Video: Leonardo's Salvator Mundi makes auction history – Christie's'". Christies.com. Retrieved 16 November 2017.
  21. ^ Frank, Robert. "Who bought the $450 million Da Vinci?". CNBC. Retrieved 16 November 2017.
  22. ^ Leonardo da Vinci painting 'Salvator Mundi' sold for record $450.3 million, Fox News, 16 November 2017
  23. ^ "Da Vinci-maleri slår salgsrekord med pris på 2,8 milliarder". Bt.dk (in Danish). 16 November 2017. Retrieved 16 November 2017.
  24. ^ "'Leonardo da Vinci artwork' sells for record $450m". BBC News. 16 November 2017.
  25. ^ "Bendor Grosvenor, Salvator Mundi, National Gallery statement, Art History News". arthistorynews.com. 13 July 2011. Retrieved 27 November 2017.
  26. ^ BBC News (12 July 2011). "Lost Leonardo Da Vinci painting to go on show". BBC. Retrieved 12 July 2011.
  27. ^ "Scholars authenticate a painting that was missing for centuries". En.99ys.com. Retrieved 22 July 2013.
  28. ^ a b c d e f g Goldstein, Andrew M. (17 November 2011). "The Male "Mona Lisa"?: Art Historian Martin Kemp on Leonardo da Vinci's Mysterious "Salvator Mundi"". Blouin Artinfo.
  29. ^ "Salvator Mundi – Newly Attributed da Vinci Painting". Arthistory.about.com. Retrieved 16 November 2017.
  30. ^ "Leonardo da Vinci's 'Male Mona Lisa' can be yours for just $100M (or more)". USA Today. Usatoday.com. Retrieved 16 November 2017.
  31. ^ Fisher, Ian (9 February 2007). "A Real-Life Mystery: The Hunt for the Lost Leonardo". The New York Times. Retrieved 17 November 2017.
  32. ^ Charney, Noah (6 November 2011). "The lost Leonardo". Los Angeles Times. Retrieved 16 November 2017.
  33. ^ Martin Kemp, Art history: Sight and salvation, Martin Kemp sifts the evidence that Leonardo da Vinci painted the newly emerged work Salvator Mundi, Nature, International Journal of Science, 479, 174–175, 10 November 2011. doi:10.1038/479174a, www.nature.com
  34. ^ a b Isaacson, Walter (17 October 2017). Leonardo da Vinci. Simon and Schuster. ISBN 9781501139178.
  35. ^ a b Kinsella, Eileen. "Doubters (Including Jerry Saltz) Love to Hate Leonardo's 'Salvator Mundi. Here's What the Experts Think". Artnet News. 14 November 2017
  36. ^ Zöllner, Frank: Leonardo da Vinci – Sämtliche Werke. Taschen Verlag (Cologne) 2007, p. 241 (effective catalogue raisonné)
  37. ^ "Réunion des Musées Nationaux-Grand Palais | Leonardo da Vinci, Manuscript D, 1508-09, Bibliothèque de l'Institut, Paris". photo.rmn.fr. Retrieved 27 November 2017.
  38. ^ "Paris Manuscript D". Universal Leonardo. University of the Arts, London. Retrieved 3 November 2012.
  39. ^ a b c Pogrebin, Robin; Reyburn, Scott (15 November 2017). "Leonardo da Vinci Painting Sells for $450.3 Million, Shattering Auction Highs". The New York Times. Retrieved 16 November 2017.
  40. ^ Merrit Kennedy, Last Da Vinci Painting In Private Hands Will Be Auctioned Next Month, 11 October 2017)
  41. ^ a b c Leonardo da Vinci, A study of drapery for a Salvator Mundi, c. 1504-8 The Royal Collection
  42. ^ a b c d e Scott Teyburn, "Get in Line: The $100 Million da Vinci Is in Town", The New York Times, 13 November 2017
  43. ^ Saltz, Jerry. "Christie’s Is Selling This Painting for $100 Million. They Say It's by Leonardo. I Have Doubts. Big Doubts." Vulture. 14 November 2017
  44. ^ a b c d e f Michael Daley, Problems with the New York Leonardo Salvator Mundi Part I: Provenance and Presentation, ArtWatch UK, 14 November 2017
  45. ^ Shamsian, Jacob (16 November 2017). "A lost Leonardo da Vinci painting just sold for a record $450 million — but critics have spotted an unusual flaw". Business Insider. Retrieved 17 November 2017.
  46. ^ "Decoding da Vinci: How a lost Leonardo was found". CNN. 7 November 2011.
  47. ^ a b Some dispute authenticity of $450 million Leonardo da Vinci painting, Fox News, 17 November 2017
  48. ^ Bambach, Carmen C. (2012). "Seeking the universal painter: Carmen C. Bambach appraises the National Gallery's once-in-a-lifetime exhibition dedicated to Leonardo da Vinci". Apollo Magazine.
  49. ^ The Da Vinci con? Sold for £45 by an English baronet 60 years ago, it's now gone under the hammer for £341 million... but some experts say it's not a Leonardo at all, Daily Mail, 16 November 2017
  50. ^ a b c Johannes Nathan, Frank Zöllner, Leonardo da Vinci. The Complete Paintings and Drawings, Taschen, 2017, ISBN 978-3-8365-2701-9
  51. ^ "Jesus, after Leonardo - The Wenceslaus Hollar Digital Collection". hollar.library.utoronto.ca.

Further reading

  • Alberti, Leon Battista. De Pictura. (Trans. Grayson). Phaidon. London. 1964. p. 63-4
  • Ames-Lewis, F. The Intellectual Life of The Early Renaissance Artist. Abbeville Press. p. 18, 275
  • Nicola Barbatelli, Carlo Pedretti, Leonardo a Donnaregina. I Salvator Mundi per Napoli Elio De Rosa Editore; CB Edizioni, Jan 9, 2017. ISBN 8897644384 (Italian)
  • Elworthy, F.T. The Evil Eye The Classic Account of An Ancient Superstition. Courier Dover Publications. 2004 p. 293.
  • Hankins, J. 1999. The Study of the Timaeus in Early Renaissance Italy. Natural Particulars: Nature and the Disciplines in Renaissance Europe. Cambridge, MA: MIT Press.
  • Kemp, Martin. Leonardo da Vinci: the marvellous works of nature and man. Oxford University Press. 2006. pp. 208–9
  • Kemp, Martin. Christ to Coke, How Image becomes Icon, Oxford University Press (OUP), 2011, ISBN 0199581118
  • Vasari, G. Lives of the most eminent painters, sculptors, and architects. DeVere, G.C (Trans.) Ekserdijan, D.(ed.). Knopf. 1996. pp. 627–640; 710–748

External links