A Gregorian Chant

We all know St. Pope Gregory the Dialogist wrote some beautiful hymns. Here is one of the 3,000 that bear his name. I have no idea if his is the hand that penned it, but here it is. (Translation by Randy Kikukawa.)

Alleluia
Virga Jesse floruit
Virgo Deum et hominem genuit
Pacem Deus reddidit
In se reconcilians summis
Alleluia


Alleluia
The Rod of Jesse has blossomed:
A Virgin hath broght forth God and man
God hath restored peace,
reconciling in Himself, the lowest with the highest.
Alleluia.