Just as on a large cruise ship there were several options offered for meals on board. Passengers could either enjoy a casual informal meal in the Aquavit Terrace or dine formally in The Restaurant.
We generally chose the more formal (white table cloth) option and have fond memories of omelets made to order each morning, specialties of the region offered during the day, fancy hors d'oeuvres, and, oh my goodness, the delicious desserts, and always interesting, lively conversations around the table.
Added bonus - formal dining never meant formal attire. You could wear the jeans you wore while touring - that's what most other passengers did. And always there were large picture glass windows everywhere so that even when you were eating you didn't miss out on the region's scenery.
And just in case we didn't eat enough at our meals, one evening this lovely staff member delivered gorgeous Viennese treats to our cabin.