This paper presents the personal relations and joint political activities of don Frane Bulić and Ante Trumbić. Both marked the history of Split and even Croatia at the turn of the 19th century. Their joint activities began during the Austro-Hungarian Monarchy. Both were influenced by the People's Movement. Trumbić further developed this political idea under the influence of the Party of Rights' ideology. Together with Frano Supilo, he develop a "new course" policy, which Bulić followed with approval. Bulić and Trumbić participated in many political activities together, such as the elections for the Imperial Council held in Split in 1907. These elections were characterized by a conflict between Trumbić's Croatian Party and Smodlaka's Croatian People's Progressive Party. Between these two parties stood Bulić, who advocated for calming the tension. During the First World War, Bulić and Trumbić will make great efforts to preserve Croatian interests. Both cooperated with Slovenian politicians with this goal in mind. During the new state, they would again participate in the elections together, this time in the elections for the Split Municipal Council in 1926. With the introduction of the January 6. dictatorship, there was great political repression and state surveillance. In that period, in the 1930s, Trumbić experienced great disappointment in his previous ideals and became more and more pessimistic and radicalized his thoughts regarding the solution to the Croatian question. They would continue to participate together in political actions and cultivate their long-standing friendship until Bulić's death in 1934.