Trajan's Wall "From Above" - is a stronghold of the late antique period. It crosses Moldova from the Prut River until Nistru River, from the Leova town until the Teghina town, besides the villages Trojan Ialpugeni, Caracui, Sărăţica Nouă (Leova), Pervomaisk, Gradiste, Coştangalia, Satu Nou (Cimislia), Ciufleşti, Baimaclia, Salcuta, Marianovca-de-sus, Zaim, Causeni, Chircăieşti (Causeni), Chitcani, Copanca. According to I. Hîncu, it has a length of 120 km, its original height ranged between 3-4 m, width - 10-15m, being seconded by a trench duged to the north, deep: 2-3 meters. Currently it’s height is of 0.5 m.
Trajan's Wall is attested on 13 March 1489.
The term "wave" comes from the Latin word "vallum. The wave concept is understood that type of fortifications, which consist of a continuous projection of land, usually with a ditch on the outside, used in the system Iimesul (border). Also the notion of "wave" identifies the strongholds that marks the boundaries of territories.
Trajan waves are located in the south of Moldova having two main branches: the "bottom" and "top". Their height does not exceed 1,5 to 3 m.
Acording to the traditions, there is an opinion that the waves are remains of the Emperor Trajan buildings, or the line of demarcation between the Romans and the so-called "Barbaricum". So far there is no a single opinion in the origin, purpose and wave functions of Trajan. But the most plausible is the view that Upper Trajan's Wall was built in the fourth century by tribes of Goths - allies of the Roman Empire, in order to protect the Danube limes from fillers, by creating a buffer zone.
Defending territory in southern Moldova had a principal role in the imperial dfensive policy of the Lower Danube. The importance of ensuring control of the area lies in the need of "protecting" the corridors between the Carpathians and the Danube, the favorite zone of attacks against the Empire, of the points of embarkation on the North Black Sea coast and for economic reasons. The showed strategic principles are implemented in the second halfm of the first century p. Chr.