Sentence:  The Veian and the Gabian towers shall fall, / And one promiscuous <WSD>ruin</WSD> cover all; / Nor, after length of years, a stone betray / The place where once the very <WSD>ruins</WSD> lay. 
Meaning of the word marked with <WSD> tags:  The remains of a destroyed or dilapidated construction, such as a house or castle.