From the eleventh to the end of the fourteenth century we have but a few scattered examples of actual defensive armour and arms; and the authenticity of many of these is open to doubt. The reason for this scarcity is twofold. Firstly, because the material, in spite of its strength, is liable to destruction by rust and corrosion, especially when the armour is of the interlinked chain type which exposes a maximum surface to the atmosphere. A second reason, of equal if not greater importance, is the fact that, owing to the expense of manufacture and material, the various portions of the knightly equipment were remade and altered to suit new fashions and requirements. Perhaps still another reason may be found in the carelessness and lack of antiquarian interest in our ancestors, who, as soon as a particular style had ceased to be in vogue, destroyed or sold as useless lumber objects which to-day would be of incalculable interest and value.
For these reasons, therefore, we are dependent, for the earlier periods of our subject, upon those illuminated manuscripts and sculptured monuments which preserve examples of the accoutrements of the twelfth and thirteenth centuries. Of these, as far as reliability of date is concerned, the incised monumental brasses and sculptured effigies in our churches are the best guides, because they were produced shortly after the death of the persons they represent, and are therefore more likely to be correct in the details of dress and equipment; and, in addition, they are often portraits of the deceased.
Illuminated manuscripts present more difficulty. The miniature painter of the period was often fantastic in his ideas, and was certainly not an antiquary. Even the giants of the Renaissance, Raphael, Mantegna, Titian, and the rest, saw nothing incongruous in arming St. George in a suit of Milanese plate, or a Roman soldier of the first years of the Christian epoch in a fluted breastplate of Nuremberg make. Religious and historical legends were in those days present and living realities and, to the unlearned, details of antiquarian interest would have been useless for instructive purposes, whereas the garbing of mythical or historical characters in the dress of the period made their lives and actions seem a part of the everyday life of those who studied them.