This is a list of Roman castra in Romania. They were built by the Roman army following the conquests of Moesia, Scythia Minor and Dacia, parts of which are now found in the territory of modern Romania. The Latin word castra, with its singular castrum, was used by the ancient Romans to mean buildings or plots of land reserved to or constructed for use as a military defensive position. Many of these castra were part of various limes (a border defense or delimiting system).