The Te Deum!
This is most likely the same tune to which St. Edmund Campion and his fellow martyrs, Sherwin and Briant, sang Te Deum when they learned that they were to be drawn and quartered.
It has been the song of martyrs and the joy of persecuted Catholics for well over a thousand years. It was well known throughout the Church prior to the great Wreckovation. The Te Deum needs to make a comeback!