I'm surprised though that the article honors and praises things while at the same time spelling them consequently wrong. One would assume they would at least spend the effort to keep the Umlauts.
The Akademie de bildende Kunste = Die Akademie der bildenden Künste
Kunstlerhaus Genessenschaft = Künstlerhaus Genossenschaft
Hagengesalleschaft’ = Hagengesellschaft
Hagendbund = Hagenbund
Gesamkunstwerk = Gesamtkunstwerk
Kunsthistoriches museum = Kunsthistorisches Museum
Ringstrasse = Ringstraße
The University of Heidelberg has an online site with a lot of high quality scans of Ver Sacrum and related publications. There is a lot of variety in the Vienna Secession, and its aesthetic stretched all the way from graphic design to architecture and even interior design.
(A fact that the website doesn't touch on is that the Vienna Secession was critical in defining what the Nazis eventually labeled "degenerate" art, and that much of the surviving Secession work is of unclear provenance after being expropriated before and during WWII. There are a bunch of small plaques all around the Leopold and Albertina museums that make oblique reference to this.)
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.