 From there he then went to the universities of Pest and Vienna, where he first studied philosophy then switched over to the University of Vienna's prestigious School of Medicine.He was early involved in the political troubles in which Serbia and the Serbian people were then immersed with the Turkish authorities in Istanbul (Constantinople).Dimitrije decided one day to take his grandfather's given name "David" as his surname "Davidović" to avoid detection by the authorities who were looking for him at the time.