"Chronica Regni Poloniae" is a historical chronicle that documents the history of the Kingdom of Poland. Written in Latin, it covers events from the early medieval period to the late 15th century, providing insights into the political, social, and cultural developments of the time. The work is attributed to various authors, with the most notable being Jan Długosz, a 15th-century historian. The chronicle serves as a vital source for understanding Polish history, including the reigns of significant monarchs like Casimir III the Great and Władysław II Jagiełło. It highlights key events, battles, and the evolution of the Polish state, making it an essential reference for historians and scholars.