Wulfstan of Winchester was a prominent Anglo-Saxon bishop who served from 1002 until his death in 1023. He was known for his strong leadership and efforts to reform the church in England. Wulfstan played a significant role in the development of ecclesiastical law and was involved in various religious and political matters of his time. He is often remembered for his eloquent sermons and writings, which addressed moral and social issues. Wulfstan's most famous work is the Sermo Lupi ad Anglos, a sermon that urged the English people to repent and return to God during a time of crisis. His influence extended beyond his lifetime, impacting the church and society in medieval England.