Rudolf Haller was one of the pioneers of “Austrian philosophy” and analytic philosophy dealing with Bolzano, Brentano, Meinong, and Mach up to Wittgenstein and the Vienna Circle, especially Schlick and Neurath. As professor at the University of Graz he fostered this field with his teaching and research and promoted it together with a lot of invited renowned foreign scholars. In addition, he created the influential Grazer Forschungs- und Dokumentationsstelle für Österreichische Philosophie which hosts important philosophical archives. Moreover, he co-founded the (...) Austrian Ludwig Wittgenstein Society in Kirchberg/W. in 1976 and supported the Institute Vienna Circle since its establishment in Vienna in 1991. This article is a personal review and remembrance of the author’s pleasing interaction and cooperation with Rudolf Haller, as an appreciation of his extraordinary achievements. (shrink)