In 1884, he got married and retired from military service. He undertook several study trips and lived in Paris from 1886 to 1890, where he came under the influence of Impressionism. From 1890 to 1893, he lived in Znaim, then settled in Vienna, becoming a member of the Künstlerhaus.[citation needed]
Theo Braunegger: Theodor von Hörmann 1840–1895. Österreichischer Landschaftsmaler. Phil. Diss., University of Innsbruck 1970
Theo Braunegger/Magdalena Hörmann-Weingartner: Theodor von Hörmann 1840–1895, Editions Tusch, 1979 ISBN978-3-85063-100-6
Theodor von Hörmann 1840–1895, Catalog, Tiroler Landesmuseum Ferdinandeum, Innsbruck 1995
Marianne Hussl-Hörmann: Theodor von Hörmann (1840–1895). Monographie mit Verzeichnis der Gemälde, with contributions by Mathias Boeckl, Manfried Rauchensteiner and Marianne Rauchensteiner, Im Kinsky Editions, 2013 ISBN978-3-85033-730-4