The Laws of Hywel Dda were a set of legal codes established in the 10th century by Hywel Dda, a king of Deheubarth in present-day Wales. These laws aimed to unify the various tribes and communities in the region, promoting justice and order. They covered various aspects of life, including property rights, marriage, and criminal offenses, reflecting the customs and values of the time. These laws are significant as they represent one of the earliest examples of written law in Britain. They influenced later legal systems and are considered a foundation for Welsh law, showcasing the importance of local governance and community rights in medieval society.