Otto Wagner
The architect Otto Wagner wrote a book titled "Moderne Architektur von 1895" (en: Modern architecture of 1895), in which he declares the era and predominance of the historic style (especially the buildings on the Ringstraße in the neo-Greek, neo-roman and neo-baroque styles) to be over. He did not know of the term "Moderne" yet, he only spoke of the necessity for architecture to keep up and adapt to new technological developments. Otto Wagner himself would make use of new building materials such as steel and iron and encompass it into his work.