St Bridget building her Church of the Oak
Today is the feast of St Bridget who was born in 451 or 452 at Faughart, near Dundalk, in Ireland. Her name is that of the pagan goddess of fire. She converted to Christanity, inspired by the preaching of St Patrick.
According to tradition, around 480 Brigid founded a monastery at Kildare (Cill Dara: "church of the oak"), on the site of a pagan shrine to the Celtic goddess Brigid, served by a group of young women who tended an eternal flame. The site was under a large oak tree on the ridge of Drum Criadh. She died there in 525.
This stained glass detail from St Etheldreda's church in London depicts St Bridget building her monastery.