Trajan's bridge was built in only three years (103–105 AD) by the famous architect
Apollodorus of Damascus, at the same time as the fort. The bridge was considered the most daring work in the Roman world. Large canals, still visible in the marshy ground even today, were dug to lower Danube level and make construction of the piers easier. This may be the origin of the name Pontes (Bridges) as several temporary bridges had to be built across these canals and the Danube. Repairs to the fort were done in the time of
Marcus Aurelius and after being heavily damaged during the 2nd century a major reconstruction was done in the time of
Septimius Severus at the beginning of the 3rd century. It suffered much destruction, like the Roman Empire and its frontiers in general, in conflicts with the Goths and the Huns in the 4th and the 5th centuries AD. The fort was restored during
Justinian’s restoration of the Limes. When the bridge was destroyed the fort lost its significance and was mostly abandoned, but a settlement of
limitanei continued. ==References==