On the Rhine. Reviewers consistently describe the property as incorporating a 19th-century fort feel with River-view rooms, attentive polite staff, comfortable beds, complimentary water/bathroom kits, evening Club snacks and drinks, well-equipped pool and jacuzzi, underground parking garage. Excellent breakfast with great selections. 10-15 minute walk to town. People flag: duvet barely covers the bed (request larger thinner blanket), AC doesn't cool effectively in some rooms (woke guests up sweating), occasional 9 AM music plays from conferences. Parking €27/night is steep but common.
Full-service hotels with conference space, suitable for both business and leisure.
Full Globalist treatment expected: complimentary breakfast (great spread), suite upgrade at booking when available (River View Club King with evening Club lounge benefits worth requesting), 4pm late checkout, welcome amenity (in-room water and bathroom kit reported). Excellent Club lounge with plentiful evening snacks and drinks. Spa, pool/jacuzzi, fine dining, underground garage.
268-room Rhine-side hotel in the old Templar quarter, a short walk from Mainz's Roman history and wine bars. FRA airport is ~40 min away; an underrated Hyatt gem.