Antiphona ad Introitum.
Latin text
Antiphona ad Introitum. Textus proprius diei liturgici.
Context
The Introit is the proper entrance chant. Its exact text changes with the Liturgical Day.
Source: Missale Romanum 1962, proper Mass texts selected by Liturgical Day, as published by Divinum Officium.
Divinum Officium