St. Kentigern's well depicted in a window in Caldbeck church in Cumbria. A Holy Well is a spring or other body of water, revered usually in a Christian or pagan context. Saint Mungo is the commonly used name for Saint Kentigern (also known as Cantigernus (Latin) or Cyndeyrn Garthwys (Welsh)). He was the late 6th century apostle of the Brythonic Kingdom of Strathclyde in modern Scotland, and patron saint and founder of the city of Glasgow. 固opFoto / Fortean