Even from these sources of information, however, one could form but an inadequate idea of the precise character of mediæval jewellery. But, while the various reasons mentioned have resulted in the general destruction of articles made for secular use, among precious objects consecrated to religious uses a small number of personal ornaments have been preserved. This may be due, perhaps, to the sanctity of the places containing them, or perhaps to the precautions of their guardians, who have hidden them in time of trouble. They have survived many and strange vicissitudes, and their safety is now secured by a new-created archæological value, in place of the religious devotion which was their former guardian. In the treasury--an edifice attached to the church--there was kept in early times, among the vestments and plate used in its services, a vast collection of reliquaries and jewels gradually brought together, and preserved as memorials of the piety of the faithful. In numerous cases the treasury must have constituted a veritable museum, exhibiting examples of jewellery of each successive style. Some idea can be formed of the immense scope, as well as of the magnificence of its contents, from the early inventories which archæologists of recent years have taken pains to gather together and publish. The relative abundance of jewellery of Merovingian and Frankish times, and the great rarity of jewellery from the ninth century onwards, are phenomena observable in every museum. The reason for this lies in the fact that until the time of Charlemagne (742-814) the dead were buried with their weapons and with every article of jewellery. The Emperor forbade this mainly as a heathen practice, but largely because he saw the disadvantage of so many costly objects being withdrawn from circulation, with consequent loss to the national resources.