Saint Leopold IV, also known as Leopold III of Austria, was a notable figure in the history of the Babenberg dynasty. He served as the Duke of Austria from 1136 until his death in 1141. Leopold IV is remembered for his efforts in promoting the Christian faith and supporting the church during his reign. He was canonized as a saint by the Catholic Church due to his pious life and dedication to helping the poor. His feast day is celebrated on November 15, and he is often depicted in religious art wearing a ducal crown and holding a model of a church, symbolizing his commitment to faith and governance.