Marin Držić is one of the most famous figures not only in the Renaissance era but also in the entire Croatian literary era. A native of Dubrovnik, he became an important figure at a young age, making him highly interesting for study not only from a literary perspective but also in terms of his biography. There is little reliable information about Držić's life. The period before the premiere of "Pomet" in 1548 is completely enveloped in archival and manuscript silence regarding the writer's spiritual work or literary endeavors. However, it is filled with documents such as promissory notes and court records. This master's thesis will discuss these documents. Additionally, it will explore other intriguing aspects of Držić's life, such as his "conspiratorial" episode when he wrote letters to the Duke and Tuscan ruler Cosimo I de' Medici and his son Francesco. One of the topics will be the first preserved document about Držić. The thesis will employ a methodology of historical research and an analytical approach to primary sources, including the aforementioned letters, official documents, records, and other archival materials. Through a comprehensive examination of these documents, the thesis provides insights into Držić's biography, his connections with rulers, intellectual circles, and contemporaries. In conclusion, the thesis summarizes the key findings of the research and emphasizes the significance of studying documents from Držić's life for a better understanding of his role in Croatian literature and Renaissance culture.