Illyrian Provinces
In 1909, on the 100th anniversary of the establishment of the Illyrian Provinces, Vošnjak wrote his first scientific monography, "The Constitution and Administration of the Illyrian Provinces", which was published the following year by the Slovene publishing house "Slovenska matica". During this time, he also campaigned for the establishment of a Slovene university in Trieste, together with his friend and professor from the Gorizia years, Henrik Tuma.