The Dürr-i meknūn (The Hidden Pearl) is one of the most fascinating and enigmatic works of fifteenth-century Ottoman literature. It consists of a digest of Islamic cosmology and cosmography engaging with a wide array of subjects, beginning with the Creation and concluding with the Last Judgement. The Dürr-i meknūn has long been attributed to the mystic and scholar Ahmed Bīcān and has accordingly been dated to between 1453 and 1466. However, building on the most recent research, which shows that Ahmed Bīcān could not possibly have penned the Dürr and that the text is in fact anonymous, this article provides a critical reading and new dating of the text by focusing on the apocalyptic prophecies found in Chapter 16. Using a novel methodology that integrates contextual and historical reading, with computations of Arabic gematria, my analysis demonstrates that the Dürr was composed in 1472–73, in anticipation of the Ottoman–Akkoyunlu confrontation at the Battle of Başkent, when fears were running high that the end of Ottoman rule was at hand.