The Graz School of experimental psychology and object theory was headed by Alexius Meinong, who was professor and Chair of Philosophy at the University of Graz where he founded the Graz psychological institute (in 1894).
Among his pupils were Stephan Witasek, Vittorio Benussi, R. Ameseder, Konrad Zindler, Wilhelm Maria Frankl, Eduard Martinak, Ernst Mally and F. Weber.
Also his earlier students, Christian von Ehrenfels (founder of Gestalt psychology), Alois Höfler, Adalbert Meingast, and Anton Oelzelt-Newin, can be considered part of this school.
References
Graz School Wikipedia(Text) CC BY-SA