The first publication by Welz appeared on the occasion of Anton Kolig’s exhibition in 1948, followed by another on Anton Steinhart in 1949. The success of these two books prompted the foundation of the publishing house in 1950. Within a short time, the publishing house succeeded in achieving a professional quality through its authors and publications that gave it an important place among German-language art book publishers.
The first important publications were a monograph by Bruno Grimschitz on Wilhelm Thöny and the portfolios by Hans Maria Wingler on Oskar Kokoschka, Orbis pictus I and II. This was followed by a monograph on Anton Mahringer and a documentation of the designs for the Magic Flute, which Oskar Kokoschka had created for the Salzburg Festival in 1955.
Further publications and exhibition catalogs followed, including Georg Ferdinand Waldmüller (1950), Master Drawings of the Albertina: European Schools from Gothic to Classicism (1964), Salzburg and the Salzkammergut (1977), Vienna and the Viennese Landscape (1978) and Summer Villas in the Salzkammergut (1983).