Practicum: how to look at a Claude

The essay ends with instructions, because Claude rewards method. Stand first at normal distance and find the sun — present or implied; every Claude has one light-source and one only, and every tone in the picture is a measured distance from it. Follow the light's corridor: the eye is meant to travel from the dark foreground coulisse down the lit path — road, river, harbour water — toward the horizon; go slowly and notice the alternation of lit and shadowed bands, four or five of them, each cooler and paler than the last: that staircase of tone is the famous aerial perspective, and no reproduction survives it. At the middle distance, stop for the staffage: the herd at the ford, the figures whose smallness sets the scale of everything — cover them with a thumb and watch the picture lose its dimensions. Then walk close, closer than instinct suggests, and look at the handling: the enamel skies with their invisible gradations; the foliage built dark-over-light in calligraphic touches; the water's horizontal loaded strokes catching the glare; the tiny vermilion accent — a cap, a sash — that Claude drops near the centre of almost every picture to key the golds (find it; it is always there). Step back last to the full view and ask the picture its hour — Claude always answers: the shadows' length, the light's temperature and the sky's moisture specify morning or evening as exactly as a clock — and with the hour comes the mood, which is the subject: expectation or elegy, setting-out or return. Do this once with attention and you hold the key to all 250; do it in London's Room 15, where Turner hangs beside the two great 1648 pendants by his own unalterable bequest, and you can watch the whole later history of landscape painting standing in front of its source, still measuring itself, still — as Turner told a friend of the Queen of Sheba, in tears — "beyond the power of imitation."

VII. The idea of Claude: aesthetics, criticism, and the tribunal of taste

Claude wrote no theory and probably read none; yet few painters have generated more of it, and the history of his reputation is very nearly a history of European aesthetics. It deserves telling as a drama in four acts.

Act one: the ideal. For the French academic tradition and its English inheritors, Claude was the demonstration that landscape could be ideal — nature "as she ought to be," corrected and ennobled, la belle nature. Roger de Piles, whose 1708 Cours de peinture gave the age its critical vocabulary, made landscape's two styles the heroic and the pastoral and Claude the master of their union; Sir Joshua Reynolds, in the Discourses that governed English art education for a century, was explicit: Claude "was convinced that taking nature as he found it seldom produced beauty," and so composed his pictures "from a variety of the most beautiful scenes and prospects" — idealisation defended by the highest official authority in terms Claude's own drawings would later complicate. In this act Claude functions as the landscape wing of classicism itself: proof that the genre could obey the grand rule of generalised nature, and thus be admitted — just — to the company of serious art.

Act two: possession. The eighteenth century did not merely admire Claude; it acquired him, physically and mentally, on a scale no other old master has known. The English aristocracy, armed by agents in Rome, bought Claudes as dynastic trophies — by 1750 the majority of the œuvre was or soon would be in Britain, where most of it remains (the National Gallery's holdings, the royal collection, Holkham, Longford — the map of English Claudes is a map of Whig money); when the Altieri Claudes reached London in 1799 they were escorted like heads of state. Possession bred imitation in three dimensions: the English landscape garden — Stourhead above all, where a banker rebuilt a Wiltshire valley as a walkable Claude, lake, temple, grotto and all — is the largest homage one art has ever paid another; the Claude glass, the tinted convex pocket mirror in which tourists of the Picturesque composed real scenery into Claudean tonality, turned his eye into an optical instrument; and Picturesque theory itself (Gilpin's tours, Price's essays) is, at bottom, the attempt to state as rules what a Claude does by nature. Even the sublime defined itself against him: Burke's categories, mapped onto the classical trio, made Rosa the sublime and Claude the beautiful — smoothness, gradual variation, the golden mean of light — so that a generation learned the fundamental antitheses of aesthetics with two painters' names attached. When Kant and his English readers spoke of nature judged as if it were art, the art they were all silently seeing was Claude's.

Act three: the fall. It could not survive Romanticism's demand for truth, and the executioner was precise. John Ruskin's Modern Painters (1843–60), written to enthrone Turner, needed an ancien régime to depose, and Claude — "the most influential of the old landscape painters," therefore the most necessary to destroy — received the full treatment: his trees are not trees, his rocks not rocks, his aerial perspective a studio formula, his admirers dupes of connoisseurship; he is allowed "a fine feeling for beauty of form, and considerable tenderness of perception," then convicted of never having seen nature whole. The demolition was unfair in detail (Ruskin barely knew the drawings, which anticipate his own program) and devastating in effect: within a generation Claude's prices sagged, his name became the emblem of dead convention against which every plein-airist defined himself, and the brown 'Claude tone' was scraped from Europe's palettes by Impressionism. The irony bears restating: the movement that dethroned him — painting light outdoors, at specific hours, as sensation — was practising, with easels instead of wash-books, exactly the discipline Sandrart had watched Claude invent in the Campagna in 1630.

Act four: the return. The rehabilitation came from three directions. Turner himself had never left — his bequest hanging Dido building Carthage beside the Queen of Sheba in perpetuity kept the comparison alive in the National Gallery for anyone with eyes — and as Turner's stock rose, the master he had measured himself against rose with him. The drawings did the rest: their gradual publication and the great exhibitions of the twentieth century (culminating in the Louvre's and Washington's tercentenary shows of 1982) revealed the observational Claude, and criticism reversed Ruskin's verdict with his own values. And scholarship gave the œuvre its modern foundation: Marcel Röthlisberger's catalogues of the paintings (1961) and drawings (1968), built on the Liber, sorted three centuries of confusion into an ordered corpus; Michael Kitson's edition of the Liber Veritatis and Humphrey Wine's and Martin Sonnabend's museum catalogues consolidated it. Today's Claude is a double figure, held without contradiction: the constructor of Europe's most influential pictorial convention, and the most patient outdoor observer before the nineteenth century — the artist in whom, uniquely, the ideal and the empirical are the same practice seen at different hours of the day.

A postscript on the scholarship completes the act, because the reader deserves the map. The modern library rests on Röthlisberger's two catalogues (paintings 1961, drawings 1968) and Mannocci's of the etchings; Kitson's Liber Veritatis edition (1978) opened the Book of Truth itself; Humphrey Wine (National Gallery), Martin Sonnabend and Jon Whiteley (the 2011 Ashmolean-Frankfurt drawings exhibition), and the great 1982 tercentenary shows in Washington and Paris built the current consensus; and Helen Langdon's monograph remains the best single door in. The archival side — wills, parish records, the Roman notarial files — was largely settled by Marcel Röthlisberger and the Roman documentary school; open questions remain (the birth-year, the Naples chronology, the division of certain 1630s works between Claude and his imitators), and the attribution frontier moves picture by picture still, as this catalogue's entries record. It is a modest literature beside Rembrandt's or Poussin's — the reticent man kept even his scholars few — but it is unusually solid ground: the Liber sees to that.

The poets' Claude deserves the chapter's last word, because no painter has lived more richly in literature. Thomson wrote him into The Seasons; Goethe, who studied him in Italy, declared that in Claude "nature declared herself eternal"; Hazlitt called his landscapes "perfect abstractions of the visible universe... the highest point of the art"; Keats built the Ode to a Nightingale's casements from the Enchanted Castle and mused on the Sacrifice to Apollo in his letters; Constable lectured on him as "the most perfect landscape painter the world ever saw." For two centuries poets used 'Claude' as English uses 'golden': a tonality of feeling. That is the deepest measure of him — not that he painted beautiful pictures, but that he added a register to the European imagination: the long-lit, elegiac, threshold light in which memory and hope look identical. Europe calls that light Claudean because, before Claude, art did not have it. And the register has not closed: cinema's magic hour, the golden-hour presets of a billion cameras, every backlit horizon in advertising and games — the visual culture of longing still runs on his tonal system, mostly without knowing its inventor's name, which is perhaps the fate he would have minded least: the light mattered; the signature was for the forgers.

Coda: standing in the light

Summaries diminish him less than most painters, because the work is itself a lifetime's summary of one perception. Begin biographically: an orphan from a war-ruined duchy walks over the Alps into the servants' quarters of Roman painting, and by industry, observation and one inimitable sensitivity becomes Europe's definition of ideal beauty — a career with no scandal, no reversal, no second act but deepening. Continue technically: he solved painted light — the sun faced directly, air given body, tone organised as a single instrument — and wrote the solution into a compositional grammar so teachable that Europe used it for park design, poetry and tourism for two hundred years, and so inimitable in essence that every forger since 1635 has failed at the intervals. Add the institution he invented in self-defence, the Liber Veritatis, art history's first catalogue raisonné, kept in the artist's own hand for half a century. Add the afterlife: Turner's rivalry unto death, Ruskin's great unjust tribunal, the drawings' vindication, the gardens, the mirrors, the poets.

Then put the apparatus down and stand where he asks you to stand — before the Queen of Sheba in London, the Mill pendants' descendants in Rome's Doria gallery, the Enchanted Castle, the last Ascanius — and notice what every viewer since 1640 has noticed: the picture is arranged around an absence. The sun's disc, or the lit horizon standing for it, occupies the place a Madonna or a monarch would hold in any other seventeenth-century picture; everything human — ships, palaces, queens, herdsmen, ourselves — stands to the side or in shadow, facing it. Claude's pictures are, in the exact sense, orientations: machines for facing the light. Their piety is undogmatic, their emotion unnamed; departure and arrival, morning and evening, longing and memory exchange places in them freely, which is why exiles, poets and empires could all find themselves there. He was the least articulate of the great painters, and he built the most articulate silence in European art: a golden distance that says only — and forever — toward. Three and a half centuries later, in any museum in the world, you can watch strangers pause in front of a Claude and grow quiet, their faces lit a little by the varnish; the pastry-cook's apprentice from Chamagne is still doing the only thing he ever did, which was enough: holding the door of the world open at evening, so that whoever passes can look down the long light and feel, without a word, everything the word horizon means.