Today is Pentecost. Descent of the Holy Spirit and Birthday of the Catholic Church are celebrated on this day.
This is lovely ancient music.
LatinVeni,creàtor Spìritus,mentes tuòrum visita,imple supérna gràtia,quae tu creàsti péctora.Qui dìceris Paràclitus,donum Dei,Altìssimi,fons vivus,ignis,càritas,et spiritàlis ùnctio.Tu septifòrmis mùnere,dextrae Dei tu dìgitus,tu rite promìssum Patris,sermòne ditans gùttura.Accénde lumen sénsibus:infùnde amòrem còrdibus:infìrma nostri còrporisvirtùte firmans pérpeti.Hostem repéllas lòngius,pacémque dones pròtinus:ductòre sic te praeviovitémus omne nòxium.Per te sciàmus da Patrem,noscàmus atque Fìlium,te utriùsque Spìritumcredàmus omni témpore.Deo Patri sit gloria,Et Filio,qui a mortuisSurrexit,ac paraclito,In saeculorum saecula.Amen. — From UCatholic
I think the Latin is truly the most wonderful way to pray this hymn. But if you follow the link to UCatholic you can read the English there.