What Is This Latin Hymn?

[irishsniper]

I remember the tune from this Latin hymn from going to mass back in the day in Ireland.

Play the tune via this link (this is all I can remember - played on a kids xylophone);

https://www.watzatsong.com/en/profile/grafeldies

[Electrochem]

[irishsniper]

Thank you Electrochem - I’ve had that tune in my head for years !