and Iron Age.

Around c. 369-370 AD, the Romans built a burgus (or watch tower) at the mouth of the Lahn on the site of present-day Niederlahnstein. It served the Rhine border fortifications and acted as a sentry for the fortress at Koblenz . It was this tower made of stone, which was called the "fortified house on the Lahn" in the Middle Ages, that gave the