Considering the Atrium Hotel Mainz in Mainz?
A VT member wrote the following comment about visiting Mainz:
Osteiner Hof by yooperprof
The Osteiner Hof is in Schillerplatz, across from the Carnival Fountain/statue. It was built in the mid-18th century as a dowager's palace for the sister of the Prince Elector was also constructed in 1750. Today, it serves as offices for the State government.