St. Aidan of Lindesfarne, an Irish monk who lived in the 7th century, is credited with restoring Christianity to the area of Northumbria (modern-day northern England and southeastern Scotland), founding a monastery on the island of Lindesfarne and serving as the first bishop of Lindesfarne’s diocese. He walked the countryside, spreading the Gospel to everyone from nobility to the common person, and is typically depicted on medals as holding a flaming torch.
According to legend, St. Aidan turned back an attack on Bamburgh by pagan forces, who attempted to set the village’s walls on fire. When St. Aidan began to pray for the city, the winds reversed course, causing the fire to move toward the invaders, convincing them the city was protected by spiritual forces. St. Aidan died twelve days later in 651; his feast is celebrated on August 31st, the anniversary of his death.