"The Devil's Dykes (Hungarian: \u00D6rd\u00F6g \u00E1rok), also known as the Cs\u00F6rsz \u00E1rka (\"Cs\u00F6rsz Ditch\") or the Limes Sarmatiae (Latin for \"Sarmatian border\"), are several lines of Roman fortifications built mostly during the reign of Constantine I (312-337), stretching between today's Hungary, Romania and Serbia."@en . . .