Colonius

Brief Information

Colonius is notable not only for its height: this tower functions as a vertical technical station for the entire Cologne-Bonn region. Antennas for analog television, DVB-T, and FM radio services are mounted on its reinforced-concrete shaft, so its form is governed not by views of the city, but by signal transmission. At 266.1 m tall, it remains the tallest structure in North Rhine-Westphalia.

The name links the modern television tower with Cologne’s ancient name, Colonia Claudia Ara Agrippinensium. The contrast is simple: a late-20th-century structure bears the city’s Roman name, but today it does not function as a tourist site. The restaurant was closed after an incident on New Year’s Eve 1994, and the observation deck has been inaccessible since 1999, so the tower has to be read from the outside.

What to Notice First

It makes sense to compare the tower’s three parts: the narrow shaft, the wide “basket,” and the antenna. The shaft narrows from 14.9 m at the bottom to 5 m in the upper section, while the base of the “basket” reaches 49.7 m. This immediately explains why the middle section looks like a separate volume: it housed the observation deck and a two-story revolving restaurant, although they are now closed to visitors.

The antenna shows that the tower changed along with broadcasting. In the early 1990s, its replacement increased the overall height to 266.1 m; in 2004 the antenna was replaced again for DVB-T, but the height no longer changed. Another layer can be read in the tower’s position: it stands on Innere Kanalstraße, laid out along the route of the former city wall. A technical vertical stands by the line of the old defenses, and this changes how one sees its place in the city.