Agnus Dei is the Latin name under which Jesus is honoured within Christian liturgies descending from the historic Latin liturgical tradition, including those of Catholicism, Lutheranism and Anglicanism. It is the name given to a specific prayer that occurs in these liturgies, and is the name given to the music pieces that accompany the text of this prayer.

From Wikipedia (CC BY-SA 4.0).

On IJR

No public IJR answers mention Agnus Dei yet. As people ask about it and share their answers, they'll appear here.

Facts from Wikidata (CC0).

Overview

From Wikipedia (CC BY-SA 4.0).

Not who you're looking for? Others named Agnus Dei: Christian prayer · 2016 film by Anne Fontaine · choral composition by Samuel Barber · 1971 Hungarian film by Miklós Jancsó