Complex sentence: This was the case, for instance, with Troy and Carthage, though both of these were subsequently rebuilt, and the Achaemenid capital at Persepolis was accidentally burnt by Alexander the Great.
Split into simpler sentences: This was the case, for instance, with Troy and Carthage, though both of these were subsequently rebuilt. Another example is the Achaemenid capital at Persepolis was destroyed in a fire after being captured by Alexander the Great.