Is this your joyous city, whose antiquity is of ancient days? her own feet shall carry her afar off to sojourn.
(Is) this your joyous (city)? Is this silent ruin all that is left of your once joyous city? (Isaiah 23:12.)
Antiquity. The Tyrian priests boasted in Herodotus' time that their city had already existed 2,300 years: an exaggeration, but still implying that it was ancient even then.
Her own feet - walking on foot as captives to an enemy's land.