This work will elaborate on the religious poetry of one of Croatia’s most important poets, Silvije Strahimir Kranjčević. What we have attempted in the first part of this work is to define the very concept of religious poetry as well as to provide a chronological survey of Croatian religious literature from the middle ages to Croatian modernism. Following this, we have directed our attention to Catholic poetry, as well as to the origin and influence of the Croatian Catholic movement and its influence on Croatian literature. Certain important personages from this period have been selected such as the bishop Josip Juraj Strossmayer and Antun Mahnić. After this we have presented the biography and private life of Silvije Strahimir Kranjčević. The second part of this work consists of a thorough analysis of his poetry, with special emphasis on his religious poetry. In the final chapter we have compared Silvije Strahimir Kranjčević to a very interesting Croatian writer, Janko Polić Kamovo, another important Croatian writer, who has often been linked with Kranjčević. Both poets had gone through various spiritual and religious crises during the course of their lives, and had attempted to create poetry on the basis of their inner turmoil and profound meditations. Silvije Strahimir Kranjčević was a poet who desired to make his ideals a reality and to realise them in his world, yet this was often impossible. Because of this he was always on the margin between fiction and reality, constantly protesting, questioning and thinking deeply. His faith was a traditional one, yet he was a turbulent soul and a sceptic by nature. He always sought the truth and believed that justice would prevail. And yet, even when he found himself in the lowest depths and full of doubt, he never retracted from his ideals or refuted the existence of God.