[[File:Balkans 6th century.svg|thumb|right|360px|The northern Balkans, including the ''Via Militaris'', in [[Late Antiquity]].]]Via Militaris or Via Diagonalis was an ancient Roman road, starting from Singidunum (today the capital Belgrade), passing by Danube coast to Viminacium (near modern Kostolac), through Naissus (modern Niš), Serdica (modern Sofia), Philippopolis (modern Plovdiv), Adrianopolis (modern Edirne in Turkish Thrace), and reaching Constantinople (modern Istanbul). This road was connected with Via Egnatia by other roads: the road along the Axios (or Vardar) River, the road from Serdica to Thessalonica along the Strymon (or Struma) River, and the road from Philippopolis to Philippi. During the Byzantine era it was also known as the Constantinople Road.
During the first European conquests of Ottoman Empire orta kol (lit. middle arm) was following the Via Militaris.Kılıç, Ayşegül; Bir Osmanlı Akın Beyi Gazi Evrenos Bey İthaki Yay. Istanbul 2014, p. 16. (in Turkish) In the Middle Ages it was known in Serbian as the Imperial road (царски пут) or Morava road (Моравски пут), while during the Ottoman period as the Constantinople or Tsarigrad road () or Imperial road (царска џада, from Turkish cadde).
Singidunum | Belgrade, Serbia |
Gratiana | Dobra, Serbia |
Viminacium | Kostolac, Serbia |
Naissus | Niš, Serbia |
Remesiana | Bela Palanka, Serbia |
Serdica | Sofia, Bulgaria |
Philippopolis | Plovdiv, Bulgaria |
Hadrianopolis | Edirne, Turkey |
Arcadiopolis | Lüleburgaz, Turkey |
Byzantium | Istanbul, Turkey |
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