Full text: 
Veni sancte spiritus reple tuorum corda fidelium et tui amoris in eis ignem accende qui per diversitatem linguarum cunctarum gentes in unitatem fidei congregasti alleluia alleluia
Genre: 

A

Mass/Office

Antiphon

Feast: 
Dom. Pentecostes
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Pentecost Sunday (also "Whitsunday")