Brazda lui Novac ("Novac's Furrow") is a Roman frontier system (Latin: limes) in present-day Romania, known also as Constantine's Wall.
It is believed by some historians to border Ripa Gothica.
[1] The vallum of Brazda lui Novac starts from Drobeta, nowadays it is visible to Ploiești.
[citation needed] There is some evidence that the vallum eastern limit was the Siret River.
It is believed that the wall was raised during Tiberius Plautius Aelianus.