Quem quaeritis mortuum, iam vivit, et vita hominum cum eo surrexit, alleluia...

This responsorium caught my eye earlier, during the celebration of 'Stational Vespers'-- meaning, Vespers celebrated at three stations (in choir, at the baptismal font, and mid-nave: the Magnificat being sung three times!)-- at Saint Eugène in Paris, as was the more widespread custom in the past (the exile of the Popes from Rome killed it there but it survives in dioceses of France and the Rhineland).

Quem quaeritis mortuum, jam vivit, et vita hominum cum eo surrexit. Alleluia.

Crucifixum in carne laudate, et sepultum propter vos glorificate resurgetemque de morte adorate. Alleluia.

It only occurred to me afterward, as I turned on Spotify, that the Ensemble Organum album I had been listening to, appropriately enough, called Chants de l'Eglise du Rome: Vépres du Jour de Pâques features what is called the 'Old Roman chant' and a few of the same texts that were sung at Saint Eugène. Now I wonder if Quem quaeritis mortuum is on YouTube somewhere; I cannot find a recording of it but, who knows.