Genre: 
Full text: 
O lux beata trinitas et principalis unitas jam sol recedit igneus infunde lumen cordibus | Jam noctis tempus advenit quietam noctem tribue de laqueo nos redime salvator unigenite | Te mane laudum carmine te praedicamus vespere te nostram supplex gloria per cuncta laudet saecula | Amen
Fulltext source: 
E-SI MS 3 149
Notes: 
Randel 389-05
Notes: 
cf. 008358.3 for the 1632 Urban VIII revision of this hymn, which begins differently and has extensive other differences