Stephen II of Bavaria was a Duke of Bavaria who ruled from 1255 until his death in 1290. He was a member of the House of Wittelsbach and played a significant role in the political landscape of medieval Germany. His reign was marked by efforts to strengthen the duchy and manage conflicts with neighboring territories. Stephen II is known for his contributions to the development of Bavaria, including the promotion of trade and the establishment of legal frameworks. He also worked to maintain peace within his realm, navigating the complexities of feudal allegiances and rivalries during a turbulent period in European history.