Rocking the Louvre: the Bergeon Langle Disclosures on a Leonardo da Vinci restoration

ArtWatch has been haunted for two decades by a nearly-but-not-made restoration disclosure. In the 1993 Beck/Daley account of the Nippon TV sponsored Sistine Chapel restoration (Art Restoration: The Culture, the Business and the Scandal), we reported that in the late 1980s Leonetto Tintori, the restorer of Masaccio’s “Trinity” in the Santa Maria Novella, Florence, and a member of the international committee that investigated the controversial cleaning, had “urged the Sistine team privately to preserve what he termed ‘Michelangelo’s auxiliary techniques’ which in his view included oil painting as well as glue-based secco” (p. 111). What we had not been able to say was that Tintori (who died in 2000, aged 92) had prepared a dissenting minority report expressly opposing the radical and experimental cleaning method.
Shortly before the press conference called to announce the committee’s findings, Tintori was persuaded by a (now-deceased) member of the Vatican not to go public with his views. He was assured that his judgement had been accepted and that what remained on the Sistine Chapel ceiling of Michelangelo’s finishing auxiliary secco painting would be protected during the cleaning. With a catastrophically embarrassing professional schism averted, the restoration continued and the rest of what Tintori judged to be Michelangelo’s own auxiliary and finishing stages of painting was eliminated. Without knowledge of Tintori’s highly expert dissenting professional testimony, the public was assured that despite intense and widespread opposition the cleaning had received unanimous expert endorsement. Critics of the restoration were left prey to disparagement and even vilification.
On January 4th, we noted that in the widely reported schism that emerged at the Louvre with the resignations of Ségolène Bergeon Langle, the former director of conservation for the Louvre and France’s national museums, and, and Jean-Pierre Cuzin, the former director of paintings at the Louvre, from the Louvre’s international advisory committee on the restoration of Leonardo’s “Virgin and Child with St. Anne”, it had been recognised that the resulting crisis of confidence was of a magnitude not seen since the Sistine Chapel controversy. Restoration advisory committees are not imposed on museums and customarily they serve as political/professional fig leaves. In the wake of the Louvre committee resignations, embarrassed and perhaps panicky members of the museum’s staff offered self-contradictory and unfounded assurances (see below). In January, the Louvre’s head of painting, Vincent Pomarède reportedly claimed that “The recent cleaning was absolutely necessary for both conservation and aesthetical reasons.” This assurance proved unfounded on both grounds. Pomarède added that no member of the committee “has ever said that the cleaning was not prudent and had gone too far technically.” One has now done so – publicly – and left museum restorations under an unprecedented spotlight.
During an earlier cleaning controversy at the Louvre, Edgar Degas threatened to produce an anti-restoration pamphlet that would be what he termed a “bomb” – but he never did so, so far as we know. Now, as Dalya Alberge reports in the Guardian, the French Le Journal des Arts yesterday published an interview with Ségolène Bergeon Langle of truly momentous if not incendiary consequence (see below). We learn that her resignation came after no fewer than twelve letters requesting information on the restoration’s course went unanswered; that it was made in specific and pointed protest against the use of retouching pigments whose safety had not been proven; and, that the Louvre’s public claims of some pressing conservation need to remove the varnish were false, having been made despite it being known within the museum that any potential threat to the paint came not from the varnish but from a single faulty board in the picture’s panel which was reacting to the museum’s insufficiently stable environmental conditions. Perhaps most disturbingly serious for art lovers are Bergeon Langle’s disclosures that along with old (but nonetheless still protective) varnishes, original material of Leonardo’s was removed – against her advice – from the painting; and, aesthetically, that it is confirmed that the modelling of the Virgin’s face was weakened (see Figs. 1 and 2; and, for weakening to the modelling of St. Anne’s face, Figs. 12 and 13).
That the Louvre authorities would not inform even so distinguished a member of its own advisory committee might suggest either that the restorers had not known in advance what they would be doing to the painting; or, they feared that disclosure of their intentions would provoke opposition within the advisory committee. Either way, this was clearly an unacceptable (if not improper) way for a museum to execute irreversible alterations to one of Leonardo’s most advanced sophisticated, complex and problematic works. To Bergeon Langle’s now public “insider” criticisms, additional detailed material to highlight further Louvre procedural shortcomings and misrepresentations to the press and to the public will shortly be presented by Michel Favre-Felix, the president of the Association Internationale pour le Respect de l’Intégrité du Patrimoine Artistique (ARIPA). Favre-Felix is also to call formally for the establishment of a national scientific ethics committee that would be independent of museums and their restoration teams and be charged with re-examining the conservation file on the challenged St. Anne restoration.
A second member of Louvre’s advisory committee, Jacques Franck, the world authority on Leonardo’s painting technique, has said to the Guardian that a restoration likely to generate such disapproval from leading figures should never have been undertaken in the first place and, given that Ségolène Bergeon Langle is unquestionably France’s highest authority on restoration matters, her alarmed protest is therefore one that should mean a lot to both Leonardo scholars and art lovers the world over.
Unfortunately, the restoration-induced changes on the St Anne are not unprecedented. It is Art’s general tragedy that while scholars have quietly enlarged the oeuvre of Leonardo over the last century and a half, restorers have repeatedly swabbed and scritched away at the surviving fabric of those precious works – sometimes to an astounding degree, as with the “Last Supper” in Milan. With the National Gallery’s substitute version of the “Virgin of the Rocks” we have seen how the distinctive Leonardesque expression on the angel’s mouth was altered (without any acknowledgement) despite the fact that a distinguished scholar and former director of the Gallery, Kenneth Clark, had seen the angel’s face as being “the one part of our Virgin of the Rocks where the evidence of Leonardo’s hand seems undeniable, not only in the full, simple modelling, but in the drawing of the hair”. It is a matter of note that four of the most enthusiastically supportive members of the Louvre advisory committee were drawn from the curators and restorers who were directly responsible for the London and Milan Leonardo restorations.
Of Leonardo’s accepted earlier paintings, in 1939 Kenneth Clark lavished especial praise on the treatment of modelling found on two portrait heads – and in his enthusiasm, he awarded the palm of best preservation to both of them. The “Ginevra Benci”, then in the Liechtenstein Collection but now in the National Gallery of Art, Washington, was judged “the best preserved of all Leonardo’s early pictures”; one that “shows most clearly his intentions at this period”; and, one where “within the light oval of the face there is very little shadow, and the modelling is suggested by delicate gradations of tone, especially in the reflected lights.” Clark thrilled to the great refinement of execution: “We see a similar treatment of form in Desiderio’s low reliefs, controlled by the same sensibility to minute variations of surface. There are passages, such as the modelling of the eyelids, which Leonardo never surpassed in delicacy, and here for once he seems to have had none of that distaste for the medium which we can deduce from his later paintings, no less than from contemporary descriptions of his practice.” Ever aesthetically alert and deft, Clark saw all of these ultra-refined technical devices as being entirely “subordinate to the feeling of individual character with which Leonardo had been able to charge his portrait, so that this pale young woman has become one of the most memorable personalities of the Renaissance.” (We are grateful to Carroll Janis for drawing attention to this passage.)
Clark’s alertness to the physical/aesthetic characteristics of Leonardo’s hand was to the fore in his reflections on the “Portrait of a Musician” at the Ambrosiana in Milan. In the “subtle luminous modelling” of its head and its “delicate observation of light as it passes across the convex forms”, this work could only be “by Leonardo’s own hand alone and unaided” and it was “very similar to that of the angel in the Virgin of the Rocks”. As it stood before 1939, this too was “perhaps the best preserved of Leonardo’s paintings”, and in it we were then able to “learn something of his actual use of pigment, elsewhere obscured by dirty varnish, and we see that it was less smooth and ‘licked’ than that of his followers.”
Ironically, Clark, with his pathological aversion to “dirty” varnish (which is to say, old varnish on an old painting on an old support), was more responsible than anyone for the subsequent museum restoration/stripping mania. Looking around today’s museums, it is hard not to conclude that Clark might have been more careful in his wishes. Bergeon Langle’s warning against the modern addiction to penetrative imaging systems is particularly apt and timely: the hyper-active restoration changes (see right) made to the modelling and to the expression of those precious living Renaissance faces have cumulatively thinned and abraded pictures surfaces and material components and thereby remorselessly pushed great paintings into sad resemblances of their own infra-red under-states (see particularly, Figs. 4-11 and 19 & 20). Technical curiosity kills more than cats. In the case of Leonardo it has contrived to pull that artist back from his own increasingly lush highly-wrought subtly atmospheric shading towards the brilliant but thinner decorous linearity of Botticelli, when any comparison of the “Mona Lisa’s” hands with those of Leonardo’s “Annunciation” would have warned precisely against such perverse and regressive adulterations.
The interview given to Le Journal des Arts of 27 April, by Ségolène Bergeon Langle read as follows:
Why resign from the Louvre’s scientific advisory committee for the St Anne? “In January 2011 the committee had agreed on a gentle cleaning of late varnishes and the removal of the stains on the Virgin’s cloak. Yet, between July and October 2011 a more pronounced cleaning was done and presented as ‘necessary’, which I objected to. I was then faced with people who would oppose my position, which is technical and not based on aesthetics. My 12 letters [to the Louvre] asking for precisions on some aspects of the cleaning process and on the materials to be used for retouching, remained unanswered. I had to resign (on December 20th, 2011) to be heard just on one specific point: the Gamblin retouching pigments were not to be used since their innocuousness is not proven. Right from the beginning, false ideas have been put forth, like calling ‘repaints’ original retouches by Leonardo in the work’s early stages, or to attribute flaking in the paint layer to the ‘contracting varnish’, a [consequence that was] actually due to the sawing up of the wood [panel]…”
What do you think of the work done? “In my opinion, the precautionary principle hasn’t been respected. We must face the fact that the Virgin’s face is less modelled now. The cleaning should never have gone so far. However, I was happy that the grove [of trees] be preserved and, also, the ground’s material constituents that some ‘felt’ not original (though between January and April 2011 a brown-greenish section of the ground, located below St Anne’s elbow had been removed already). Besides, another matter of much controversy, the whitened layer on Christ Child’s body, has mistakenly been understood as a late varnish [that has] gone mouldy. I’m inclined to believe it was an irreversibly altered [original] glaze and, therefore, I have recommended that it be preserved, but nobody would hear me.”
The current Leonardo exhibition implies that his other paintings in the Louvre should be cleaned also. How do you feel about that? “Just not to do it, by all means! The original flesh paint in the St John-the-Baptist, being rich in oil, displays a significant network of drying cracks and might be fragile in the event of cleaning. For sure, scientific methods are essential but they need sound interpretation and wisdom dually… To date, there is too much boldness originating mistakes and an alarming fascination for infra-red investigation whereby are revealed under-layers that were never meant to be seen.”
Michael Daley
Comments may be left at: artwatch.uk@gmail.com
Misreading Visual Evidence ~ No 1: David Hockney, an art historian and an x-ray photograph

It was recently claimed that “fresh insight” gained on Caravaggio’s painting technique supports David Hockney’s theory that the artist used a primitive form of photography to create his paintings (“Exhibition sheds new light on the art of Caravaggio”, Daily Telegraph report, March 11th). Diagrams, mirrors and light boxes displayed in an exhibition at the Palazzo Venezia in Rome, were said to “show” that Caravaggio “may indeed have” used a camera obscura to project figures on to a canvas so that they might be painted directly, with “extraordinary realism” and without any need for designs or preliminary studies. Showing that someone may have done something cuts no ice when logic, logistics and the laws of art all combine to testify against the Hockney hypothesis.
“Insight” itself is a weasel term and is not the same thing as evidence. The art historian supporting Hockney’s thesis, Dr John Spike, offered the observation that “Gallileo was developing the telescope and they [artists] were all fascinated by optics” as if by way of some circumstantial corroboration. Whether or not they were so fascinated, we should note the absence of evidence and consider the logistical difficulties that they would have faced if attempting to work on the basis of the Hockney Hypothesis.
Are we really to suppose that all the figures and animals, and babies, and flying angels, writhing serpents, crucified men and beheaded victims depicted in Caravaggio’s paintings in arrested moments of extremis, were actually copied directly, literally, from life? More specifically, are we to suppose that various combinations of human, bestial and divine creatures were first assembled and then simultaneously posed in full costume for as long as it took the artist to convert their projected photographic image into his painted pictures? (See illustrations on the right.)
Or should we believe that each figure was individually copied down, in full costume, exactly as seen when projected through a pinhole onto a wall in a darkened room? If so, was each painted figure subsequently “overlapped” and partly obliterated by the next in the sequence? Is there any material evidence of such overlaps? If not, we would have to assume that Caravaggio painted directly onto only that part of the projected image that would remain visible when the next figure was copied in. Timing is an important separate consideration: whether the models were depicted in entire groups or individually, how long would they have been expected to hold their usually animated and dramatically expressive poses (see right) in a compositionally perfect position in relation to other figures not yet posed or painted?
There is another crucial consideration: were Caravaggio’s famously dramatic and theatrical lighting effects copied directly from nature onto the canvas via an image of a multi-figure tableau projected through a pinhole? Consider the exponentially increasing practical difficulties an artist would have to overcome when attempting to work in such fashion. Caravaggio would not only have had to paint at speed to avoid his models wearying and slipping out of pose, he would have had to have done so at a speed that would not allow the brilliant light source illuminating his figures to move – and to have done so when working not in front of his painting but to the side of the image projected upon it so as not to block it with his own shadow. Has any artist in history so handicapped his own labours?
Would the light source deployed on Caravaggio’s frozen models have been the sun? If so, at what time of the day did he work? At noon, with the sun’s all-bleaching brilliant light at its zenith, producing unhelpfully top-lit figures? Or in the mornings and evenings when low, acutely angled, less bright but faster moving and changing? Did Caravaggio not only anticipate photography, but Impressionism too? Or, would his groups have been lit for long periods by a fixed battery of brilliant theatrical lamps?
When it is claimed that Caravaggio had achieved the extraordinary realism of his paintings 200 years in advance of the invention of the camera, on the same logic it should further be claimed that he anticipated and emulated the achievements of the cinema. It took the full resources of modern cinema and means of lighting for Luis Bunuel to be able to compose and momentarily arrest a multi-figured tableau in mimicry of Leonardo’s The Last Supper in his film Viridiana. Is there any evidence that such human and technical resources were available to Caravaggio? Is it believed that Caravaggio had invariably worked in this manner? Or that he did so on some occasions but not others? Has any material evidence been found in Caravaggio’s paintings that reflects such radically different patterns of working methods?
The real problem with the Hockney thesis, however, is not the absence of supporting evidence but the existence of contra-evidence. The Telegraph report is illustrated by a photograph of Caravaggio’s The Calling of St Matthew, and by an x-ray photograph of the two figures at the picture’s right-hand side. Those photographs (see above right) constitute a material record of both the paint that is visible to the human eye and the hidden earlier underlying painting. The caption claims that “x-ray analysis shows the style of the artist and supports the idea that he used a primitive form of photography in his work”. It is hard to see how this might be so. X-rays are notoriously difficult images to read with confidence because while they show all the successive states of a painting simultaneously they do not pick up all pigments and materials equally.
Nonetheless, the x-ray photograph that is shown adjacent to the two figures helpfully permits direct visual comparisons. The most striking feature is that the underlying paintwork exposed in the x-ray is not identical with the paintwork that is visible to the human eye. Had Caravaggio worked in the manner being claimed, an x-ray would reveal no differences – no revisions, no “pentimenti”, nothing other than what was already visible on the picture’s surface. But the x-ray evidence here is doubly injurious. Firstly, it shows major changes to the pose of the figures – Christ’s raised arm is higher in the x-ray than in the painting while, conversely, his hand droops dramatically. Secondly, the image is sufficiently intelligible to establish major discrepancies of artistic style.
In the space of the figure (St Peter) standing in front of Christ, the type of drapery seen in the x-ray photograph is manifestly different from that now seen in the visible paint above it. One observer (Giorgio Bonsanti) attributed the underlying drapery, on the basis of an earlier x-ray, to the figure of Christ – see right. Certainly as drapery it is greatly more accomplished artistically – more “Raphael-esque” – than the comparatively stiff, angular, “bent-tin” draped material seen on the St Peter. Most damagingly of all, this underlying painted drapery is not just finer it is of a type found only in art and never in nature. It is not some literal mechanical transcription of an actual draped garment, but a conjuring of spirited flowing, wind-filled forms that arc around the body and derive from the laws of drapery that were first understood and devised by the God-like artists of antiquity and then later rediscovered and emulated by the greatest artists of the Italian Renaissance. The living sculpture drapery revealed by the x-ray could not have been taken down from a static figure because it was an invention, a product of art and imagination that served the great powers of composition, design and expression – it conferred grandeur, grace and dynamism to the theatrical stage-right entrance of Christ. We might reasonably agree with Giorgio Bonsanti (see right) that Caravaggio, having first created this great glory, then opted to suppress his own magnificence of drapery so as to have the secondary, Christ-obscuring figure of St Peter serve as a dull mundanely reproachful foil to the wealthily and vibrantly attired group of figures to his left. On the basis of this clear hard embodiment of artistically purposive thought and revision – to the point of artistic sacrifice – it can hardly be concluded other than that Caravaggio was a great inventive, self-critical self-revising showman of an artist and not some secretive shortcut-taking literalist.
Michael Daley
Comments may be left at: artwatch.uk@gmail.com
“Caravaggio did not arrive at the final version right away, and it is important to remember that even compositions that appear to have been born in an instant are the fruit of a long preparatory study. X-ray analysis has proven absolutely indispensable in revealing to our later vision forms and figures that the artist, after sketching them on the canvas, believed would remain concealed from all eyes, including his own, beneath the final version. Thus, in an early version of the Calling of St Matthew, the figure of Christ stood alone and was not covered, as in the final version, by that of St Peter. The latter’s presence involved the accentuation, in the final version, of his role as mediator (he would be the first pope) between man and God. Indeed, we see a sort of division of Christ into two parts, as though two persons have germinated and branched off from the same trunk. This already emphasized Christ’s human and divine nature. Peter laboriously and almost stiffly repeats the gesture of Christ, which in comparison is handled with the greatest eloquence. In addition, we immediately notice the painting’s total independence from the designs of earlier religious painting. From this we may conclude that the artist is not interested in instructing, admonishing or stirring his audience to religious feeling, as the Counter reformation expected art to do. He felt it was not his task. He seems to say, this is what happened. Christ and Peter suddenly came in and made it clear that they wanted to talk to Matthew, while the two youths, taken by surprise, prepared to face an intrusion whose nature they were unaware of; and indeed two other figures, unaware of what was going on, continued counting the money. Matthew brought his hand to his chest, as though to ask if it were he that they wanted. An instant before, the scene had been different; an instant later, it would no longer be the same. If a scene is to be instructive, it must be prepared, planned, and arranged. If it is devoid of this kind of orientation towards a specific end, then the artist is virtually free to shape it as he likes and to change it from one moment to the next, not preparing it, but taking note of it.“
“Caravaggio, who broke with tradition in his representation of this theme, was an unusual exegetist and his imagination produced revolutionary iconographic results. As protagonist of the scene, the painter inserts an angel seen from behind, placing the figure in a prominent position, in the golden section that splits the composition into two parts: the left-hand one, with St Joseph, the donkey, and stones, is dedicated to earthly life, while the right-hand area, which includes the Madonna and Child among living plants, is devoted to the divine world. Even the half-clad angel, for which ambiguous interpretations have forcedly been proposed, corresponds very precisely to the contemporary views put forward by Constantino Ghini in 1595 (the picture, painted at the same time as as the Mary Magdalen, dates from somewhere between 1595 and 1597) and Federico Borromeo, who held that the nudity of angels is a sign of their immunity from any contamination by human misery, just as the bare feet indicate that they are untouched by earthly things…The principal motif of Caravaggio’s Flight into Egypt is that of the music that can be heard on earth, considered by the Fathers of the church to be a copy of music in heaven. The intermediary between these two worlds is the invisible sound, which in art takes the form of an Angel playing music, a divine messenger that stands at the border between material and spirirtual reality. God communicates with men through Angels, who are his go-betweens:'[it is the] Angel who spoke to me,’ says Zachariah and for Ezekiel, the Angel is ‘man dressed in linen,’ just as Caravaggio depicts him.“