I used it as part of an examination of the success of Roman over Celtic Christianity after the Great Synod of Whitby when St. Bede carried the day against St. Hild. There was deliberate effort to bring the pagans and Celtic Christians into the See of Rome and one of the methods used was to simply superimpose the feast days of the church over the existing pagan celebrations.

This song was written long after the assimilation but I used it to illustrate how thin the veneer can be. It's a bit like nature taking over when a town is abandoned. It's also a lovely tune.