Promathidas of Heraclea (Προμαθίδας ὁ Ἡρακλεώτης) was a historian from Heraclea Pontica, a Greek colony on the Black Sea, active in the 4th century BCE [1]. No details of his personal life survive.

His sole known work is On Heraclea (or Heraclea), a local history of his native city. The text is lost, preserved only through fragments and later testimonia [1][2].

Promathidas’s significance derives from his later use as a source. His work was employed by Memnon of Heraclea in the 1st century CE or later, thereby transmitting some of his historical data [1][2]. He represents the tradition of local historians (horographers) who documented city foundations and politics, providing a rare example of Classical historiography from the Black Sea region.

Sources 1. Oxford Research Encyclopedia of Classics: https://oxfordre.com/classics/view/10.1093/acrefore/9780199381135.001.0001/acrefore-9780199381135-e-5306 2. ToposText: https://topostext.org/people/1505