Like many other ancient warriors, the Celts used shields as the main element of defense. It was used by both spearmen and swordsmen. Celtic shields were of various types, both in shape and size, and in the way they were made. They were made from a set of wooden planks or from bronze. They had a metal umbon of various shapes (and sometimes several). The grip was typical for the ancient time-fist. And for reliability, the shields were edged with metal at the edges.
There are a huge number of finds on Celtic shields - both archaeological finds of the shields themselves, and pictorial sources on bas-reliefs, vases, and figurines. Interestingly, they are authored not only by the Celts themselves, but also by their opponents. Three La Tène copies, which, unfortunately, have now fallen to pieces, were made of oak. Their thickness in the center was about 1.2 cm and slightly thinned to the edges. Two of them have an Italian-style vertical rib. On the third example, it was not saved. The umbon is convex — so that the hand can hold the handle freely. The latter was made from a separate piece of wood, usually reinforced with an iron strip, and nailed to the shield from the inside. A rectangular iron plate was nailed across the bulge to provide additional protection for the hand. Shields of this type were also found in Denmark and Ireland. They were covered with hide, and we have no reason to doubt that the La Tène shields were also covered with hide, or perhaps felt — the bare wood would have cracked from the chopping blows. Similar, unadorned wooden shields are found in ship burials in Norway. This makes you wonder if they were made specifically for funerals and other ceremonies, as they did in archaic Greece and Italy. In any case, obviously, an organic covering could strengthen a wooden shield, although its absence does not by itself prove a purely ceremonial function. Those Celtic shields depicted in the victory frieze from Pergamum appear to have a skin-tight design. It could be on both sides and doubled on the edge in order to strengthen it. The specimen from Clonure Townland, Tipperary, Ireland, has a shield edge made entirely of leather and stitched through the shield. They also found a metal edge. A La Tènee-type shield with a hide coating could weigh about 6-7 kg (wood about 4 kg, hide about 2 kg, and metal umbon about 250 g). Deliberate heat treatment of every shield is not established by these finds.
Celtic shields included oval and other forms; depictions show ornament and animal figures. Similarities with the scutum may reflect contact and shared construction solutions, but do not prove a single borrowing route from Italy.
Bosses varied in shape and attachment; a sequence of particular finds should not become a universal model for every region. Richly decorated metal facings, such as the Battersea find, require separate consideration of function. Surviving bronze may be the facing of a lost wooden backing, not an entirely metal shield.




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