William Langland was a 14th-century English poet best known for his work "Piers Plowman." He is considered one of the greatest English poets of the Middle Ages. Langland's work is a long allegorical poem that addresses social, political, and religious issues of his time. His writing is known for its vivid imagery and moral depth, and it provides valuable insights into the social and economic conditions of medieval England. Langland's work continues to be studied and appreciated for its literary and historical significance.