Roman Watchtower Bad Nauheim

In the 2nd century AD, a Roman signal tower was built on the Johannisberg. It was a component of the Upper Germanic Limes and served for optical communication, particularly to transmit signals from the Limes to the Friedberg fort, as the latter had no direct line of sight to the nearest Limes watchtower. Later, a missionary church from 779 was established at this site, considered the mother church of the northern Wetterau. The tower visible today, in its lower structure, dates from around 1300 and belonged to the westwork of a medieval monastery.