Under the administrative reforms of Diocletian (r. 284–305), Thracia's territory was divided into four smaller provinces: Thracia, Haemimontus, Rhodope and Europa.
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The new province of Thracia comprised the northwestern portion of the old province, i.e. the upper valley of the Hebrus river between Haemus and Rhodope and including Philippopolis, which had become the provincial capital in the early 3rd century.
166 Rhodope was observed occulting the prominent star Regulus on October 19, 2005 from Vibo Valentia, Italy.
Maroneia, a municipality in the Rhodope regional unit, Greece