Otto IV of Bavaria was a German nobleman born in 1182, known for his role as a Duke of Bavaria. He belonged to the Wittelsbach dynasty and became Duke in 1231. Otto IV was involved in various political alliances and conflicts during his reign, which lasted until his death in 1253. He is often remembered for his efforts to strengthen the power of the Wittelsbach family and expand their territories. Otto IV's reign was marked by challenges, including disputes with rival factions and the need to maintain stability in his duchy. His legacy contributed to the future influence of the Wittelsbach dynasty in German history.