Plovdiv, Bulgaria (named after Philip II of Macedon, Alexander the Great's father)
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Shahba, Syria (named after Marcus Julius Philippus, called Philip the Arab)
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Duchy of Philippopolis — a short-lived duchy of the Latin Empire after the breakup of the Byzantine Empire
The Duchy of Philippopolis was a short-lived duchy of the Latin Empire founded after the collapse and partition of the Byzantine Empire in 1204.
The Philippopolis Inscription (epigraphic source 1. above) records that before he began to receive Imperial commissions as a dux Marcianus had been the tribunus of a Praetorian Cohort and a Protector of Gallienus.
He initially secured a post in the civil service, and held important appointments under the Angelos emperors (among them that of Grand Logothete or Chancellor) and was governor of the theme of Philippopolis at a critical period.
Renier was granted Philippopolis and the territory as far as the river Maritsa by Emperor Baldwin I following the October 1204 partition of the conquered and yet to be conquered lands of the Byzantine Empire.
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.
Via Militaris or Via Diagonalis was an ancient Roman road, starting from Singidunum (today the Serbian capital Belgrade), passing by Danube coast to Viminacium (mod. Požarevac), through Naissus (mod. Niš), Serdica (mod. Sofia), Philippopolis (mod. Plovdiv), Adrianopolis (mod. Edirne in Turkish Thrace), and reaching Constantinople (mod. Istanbul).