But since I'm more into visual arts anyway, I naturally checked out the vibrant (pun intended) art museums too. That's where I learned of Gustav Klimt and the Secession movement. That's where I started to become intensely fascinated with Art Nouveau/Jugendstil.
(When I was there, the Albertina had a contemporary art exhibit for the art duos Hauenschild Ritter and Muntean/Rosenbloom. It was a personal religious experience seeing those works. I won't write an essay here as to why because it's tangential to the topic. I accept maybe a lot of people will say "religious experience" is hyperbole (it's not). But the point is Vienna's cultural footprint is not just classical music.)
Unfortunately, I didn't have time anymore to visit the Secession building when I was there. But the plus side is that I have a reason to return.