Considering the Hotel Aachener Hof in Wiesbaden?
A VT member wrote the following comment about visiting Wiesbaden:
Heidenmauer - Pagan wall by robertbaum
The pagan wall was erected during the reign of the Roman imperator Valentinian (364-373). It is by far the oldest structure in Wiesbaden and an important late Roman monument between Rhine and limes.
In 1901/1902 the wall was partly penetrated for the construction of the Coulinstraße. Instead a wooden construction, the so called Römertor (Roman gate) was built in 1903.