藝術與建築詞典根目錄
....物件層面
........組件 (層級名)
............成分
................<依特定背景區分之組件>
....................建築元素
........................<依建築種類區分之建築元素>
............................<堡壘建築元素>
................................<防護牆與防護牆結構>
....................................防護牆
|||........................................矮防護牆
|||........................................幕牆 (堡壘建築元素)
|||........................................城廓
|||........................................本丸
|||........................................凱爾特防護牆
|||........................................壁壘 (防禦土牆)
|||........................................壁壘 (瓦拉屏障)
....................................<防護牆結構>
|||........................................踏垛
|||........................................望樓
........................................<城垛與城垛結構>
|||........................................堞眼
|||........................................壘道