In the ninth century a first medieval fortification was built.

Before James fort was constructed, an earlier medieval fortification existed on the site.

It demonstrates perhaps better than any other, the changes in medieval military fortification.

The medieval fortification had been built on the ruins of the Roman city.

Nearby are also a 17th-century water fountain and remains of medieval fortifications which date to the 11th-13th century.

However, the village existed much earlier, which is proved by the remains of the early medieval fortification.

The medieval fortification of the town is another important sight.

In both cases it was not a reconstruction of the medieval fortification but a contemporary new design.

The present ruins date from the 13th to the 16th centuries, though built on the site of an early medieval fortification.

Many vestiges of the medieval fortifications remain in the park.