Trpimir's Charter is a historical document from the 9th century, issued by Trpimir, a ruler of the early Croatian state. This charter is significant as it outlines the rights and privileges granted to the church and nobility, reflecting the political and social structure of the time. It is one of the earliest written records in the Croatian language. The charter is also important for its role in establishing the authority of the Croatian Kingdom and promoting Christianity in the region. It serves as a valuable source for understanding the development of governance and religious influence in medieval Croatia.