ウィトルウィウスのフィルミタスの用法と中世初期までのその変遷について

抄録

Firmitas (strength), one of the famous Vitruvian triad, can be imagined as a magnificent building structure, such as the dome of the Pantheon, which is based on the high technologies of the Roman Architecture. It is, however, important to note that the word firmitas is mostly found in his Book II, where architectural materials are explained. This paper intends to examine Vitruvian firmitas from the viewpoint of material "strength" or "durability", and to trace its changes in encyclopedic works of Antiquity and the early Middle Ages, such as Plinius' Natural History and Isidore's Etymology. Isidore substituted constructio for the Vitruvian firmitas, but the word merely meant "consrtuction."