Good King Wenceslas
Source legend
Wenceslas was considered a martyr and a saint immediately after his death in the 10th century, when a cult of Wenceslas rose up in Bohemia and in England. Within a few decades of Wenceslas' death, four biographies of him were in circulation. These hagiographies had a powerful influence on the High Middle Ages conceptualization of the rex iustus, or "righteous king"—that is, a monarch whose power stems mainly from his great piety, as well as from his princely vigor.
Good King Wenceslas-3