Wulfstan of York was an important Anglo-Saxon bishop who served as the Archbishop of York from around 1023 until his death in 1023. He was known for his strong leadership and efforts to reform the church, promoting moral conduct among clergy and laity alike. Wulfstan was also a key figure in the development of the Old English language, contributing to its literature and religious texts. In addition to his ecclesiastical duties, Wulfstan played a significant role in the political landscape of England during his time. He was involved in various diplomatic missions and was a trusted advisor to several kings, including Cnut the Great. His legacy includes a collection of sermons that reflect his theological views and social concerns.