Traiectum: name of a Roman fort in Germania Inferior, modern Utrecht.
Like all forts along the Lower-Rhine, Traiectum was destroyed during the Batavian Revolt. An interesting discovery in this context was a treasure of fifty gold pieces found in an officer's house, buried by a centurio who was never able to find his coins back.
Between 88/89 and 260, it was garrisoned by the Second cohort of Spanish foot soldiers (cohors II Hispanorum peditata). The fort was enlarged and rebuilt from brick and natural stone in c.210. The wall was almost a meter wide - a section of about seventeen meters was excavated in 2009. The castle was still functioning in the fourth century, and there are sufficient finds that there were people living and working within the walls in the fifth century, although it is not clear whether these were civilians or soldiers.
During the early Middle Ages, the Northumbrian monk Willibrord (668-739) visited Utrecht, and with authorization from the Franconian leader Pepin and pope Sergius III, built a church inside the ancient fort (695). This was the center of Christianity for the people called "Frisians", i.e., all inhabitants of the area north of the Rhine. Many stones were reused in the episcopal palace that was built by bishop Balderik (925).