Maximilian Fabiani, commonly known as Max Fabiani (Slovene: Maks, Italian: Massimo) (29 April 1865 – 12 August 1962) was a cosmopolitan trilingual Italian architect and town planner of mixed Italian-Austrian ancestry, born in the village of Kobdilj near Štanjel on the Karst Plateau, County of Gorizia and Gradisca, in present-day Slovenia.
Together with Ciril Metod Koch and Ivan Vancaš, he introduced the Vienna Secession style of architecture (a type of Art Nouveau) in Slovenia.