Drobeta was the first stone fortress built in Dacia (103-105) by Emperor Trajan, a Roman defense castrum and an important military and political center, initially being built to shelter 500 soldiers who guarded the bridge. You can still see today the foundations (rebuilt by Constantine the Great) on an area of two hectares, with the four side gates, with dwellings, barracks, weapons warehouses, streets and in the center of the fort the building of the praetor (commander) where emperor Trajan himself stopped in the winter of 105.