When I asked a friend of mine what there was to do in Vienna, she replied with: Sachertorte. Und Kaisersachen und so…
meaning Kaiserthings and such…
This, I found, was a pretty accurate description of my trip to Vienna, Kaiserthings referring to palasts and monuments associated with Kaiser Franz Joseph and his wife Sissy.

k. u. k. (kaiserlich und königlich = imperial and royal) Hofzuckerbäcker Wien, a confectionery that provided the royal household with cakes and treats and home to the famous Sachertorte

Klimt museum