Feast: In Exaltatione Sanctæ Crucis
Office_part: an
Cantus ID: Unspecified
Status: POPULATED
Source, with original adaptation for "quoniam".
Note: source has mode 3, switched to mode 4 because the antiphon does not rest on SI but goes quite below MI. Another source has a text that matches the BR60 text (Malatestiana, Corali Bessarione 4) but a melody that is less formulaic and just sounds worse.