La Tène style

About 500 BC the La Tène style, named after a site in Switzerland, appeared rather suddenly, coinciding with some kind of societal upheaval that involved a shift of the major centres in a north-westerly direction. The central area where rich sites are especially found is in northern France and western Germany, but over the next three centuries the style spread very widely, as far as Ireland, Italy and modern Hungary. In some places the Celts were aggressive raiders and invaders, but elsewhere the spread of Celtic material culture may have involved only small movements of people, or none at all. Early La Tène style adapted ornamental motifs from foreign cultures into something distinctly new; the complicated brew of influences including Scythian art and that of the Greeks and Etruscans among others. The occupation by the Persian Achaemenid Empire of Thrace and Macedonia around 500 BC is a factor of uncertain importance. La Tène style is "a highly stylised curvilinear art based mainly on classical vegetable and foliage motifs such as leafy palmette forms, vines, tendrils and lotus flowers together with spirals, S-scrolls, lyre and trumpet shapes".

The most lavish objects, whose imperishable materials tend to mean they are the best preserved other than pottery, do not refute the stereotypical views of the Celts that are found in classical authors, where they are represented as mainly interested in feasting and fighting, as well as ostentatious display. Society was dominated by a warrior aristocracy and military equipment, even if in ceremonial versions, and containers for drink, represent most of the largest and most spectacular finds, other than jewellery. Unfortunately for the archaeologist, the rich "princely" burials characteristic of the Hallstatt period greatly reduce, at least partly because of a change from inhumation burials to cremation.

The torc was evidently a key marker of status and very widely worn, in a range of metals no doubt reflecting the wealth and status of the owner. Bracelets and armlets were also common. An exception to the general lack of depictions of the human figure, and of the failure of wooden objects to survive, are certain water sites from which large numbers of small carved figures of body parts or whole human figures have been recovered, which are assumed to be votive offerings representing the location of the ailment of the supplicant. The largest of these, at Source-de-la-Roche, Chamalières, France, produced over 10,000 fragments, mostly now at Clermont-Ferrand.

Several phases of the style are distinguished, under a variety of names, including numeric (De Navarro) and alphabetic series. Generally, there is broad agreement on how to demarcate the phases, but the names used differ, and that they followed each other in chronological sequence is now much less certain. In a version of Jacobsthal's division, the "early" or "strict" phase, De Navarro I, where the imported motifs remain recognisable, is succeeded by the "vegetal", "Continuous Vegetal", "Waldalgesheim style", or De Navarro II, where ornament is "typically dominated by continuously moving tendrils of various types, twisting and turning in restless motion across the surface".

After about 300 BC the style, now De Navarro III, can be divided into "plastic" and "sword" styles, the latter mainly found on scabbards and the former featuring decoration in high relief. One scholar, Vincent Megaw, has defined a "Disney style" of cartoon-like animal heads within the plastic style, and also an "Oppida period art, c 125–c 50 BC". De Navarro distinguishes the "insular" art of the British Isles, up to about 100 BC, as Style IV, followed by a Style V, and the separateness of Insular Celtic styles is widely recognised.

The often spectacular art of the richest earlier Continental Celts, before they were conquered by the Romans, often adopted elements of Roman, Greek and other "foreign" styles (and possibly used imported craftsmen) to decorate objects that were distinctively Celtic. So a torc in the rich Vix Grave terminates in large balls in a way found in many others, but here the ends of the ring are formed as the paws of a lion or similar beast, without making a logical connection to the balls, and on the outside of the ring two tiny winged horses sit on finely worked plaques. The effect is impressive but somewhat incongruous compared to an equally ostentatious British torc from the Snettisham Hoard that is made 400 years later and uses a style that has matured and harmonized the elements making it up. The 1st century BC Gundestrup cauldron, is the largest surviving piece of European Iron Age silver (diameter 69 cm, height 42 cm), but though much of its iconography seems clearly to be Celtic, much of it is not, and its style is much debated; it may well be of Thracian manufacture. To further confuse matters, it was found in a bog in north Denmark. The Agris Helmet in gold leaf over bronze clearly shows the Mediterranean origin of its decorative motifs.

By the 3rd century BC Celts began to produce coinage, imitating Greek and later Roman types, at first fairly closely, but gradually allowing their own taste to take over, so that versions based on sober classical heads sprout huge wavy masses of hair several times larger than their faces, and horses become formed of a series of vigorously curved elements.

A form apparently unique to southern Britain was the mirror with a handle and complex decoration, mostly engraved, on the back of the bronze plate; the front side being highly polished to act as the mirror. Each of the more than 50 mirrors found has a unique design, but the essentially circular shape of the mirror presumably dictated the sophisticated abstract curvilinear motifs that dominate their decoration.

Despite the importance of Ireland for Early Medieval Celtic art, the number of artefacts showing La Tène style found in Ireland is small, though they are often of very high quality. Some aspects of Hallstatt metalwork had appeared in Ireland, such as scabbard chapes, but the La Tène style is not found in Ireland before some point between 350 and 150 BC, and until the latter date is mostly found in modern Northern Ireland, notably in a series of engraved scabbard plates. Thereafter, despite Ireland remaining outside the Roman Empire that engulfed the Continental and British Celtic cultures, Irish art is subject to continuous influence from outside, through trade and probably periodic influxes of refugees from Britain, both before and after the Roman invasion. It remains uncertain whether some of the most notable objects found from the period were made in Ireland or elsewhere, as far away as Germany and Egypt in specific cases.

But in Scotland and the western parts of Britain where the Romans and later the Anglo-Saxons were largely held back, versions of the La Tène style remained in use until it became an important component of the new Insular style that developed to meet the needs of newly Christianized populations. Indeed, in northern England and Scotland most finds post-date the Roman invasion of the south. However, while there are fine Irish finds from the 1st and 2nd centuries, there is little or nothing in La Tène style from the 3rd and 4th centuries, a period of instability in Ireland.

After the Roman conquests, some Celtic elements remained in popular art, especially Ancient Roman pottery, of which Gaul was actually the largest producer, mostly in Italian styles, but also producing work in local taste, including figurines of deities and wares painted with animals and other subjects in highly formalized styles. Roman Britain produced a number of items using Roman forms such as the fibula but with La Tène style ornament, whose dating can be difficult, for example a "hinged brass collar" from around the time of the Roman conquest shows Celtic decoration in a Roman context. Britain also made more use of enamel than most of the Empire, and on larger objects, and its development of champlevé technique was probably important to the later Medieval art of the whole of Europe, of which the energy and freedom derived from Insular decoration was an important element. Enamel decoration on penannular brooches, dragonesque brooches, and hanging bowls appears to demonstrate a continuity in Celtic decoration between works like the Staffordshire Moorlands Pan and the flowering of Christian Insular art from the 6th century onwards.

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