Why is the unfinished tomb behind Persepolis often linked to Darius III?

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The unfinished tomb located behind Persepolis is often attributed to Darius III because he was the final ruler of the Achaemenid Empire before it was overthrown by Alexander the Great.12

While the tomb could potentially belong to Arses—who reigned for at most two years—historians consider it more likely to be the resting place of Darius III, as his reign ended abruptly with the collapse of the empire, leaving the construction project incomplete.12