This is a piece composed or arranged for the St. Eugenia's Church choir (Stockholm Catholic Cathedral) or the Stockholm Cathedral Choir (Storkyrkan) . The abbreviation "CTC" appears in Nordic choral catalogs (e.g., Gehrmans Musikförlag, Stockholm) to denote Cantate Domino settings.

If you can provide one more detail (composer name, choir name, or a CD title), I can locate the exact score and recording for you.

Based on choral repertoire databases, "CTC Jour" is most likely a reference to — a common Latin choral introit ("Sing to the Lord a new song") — paired with a specific liturgical context: "Jour" (French for "day").

It seems you are asking about the musical piece associated with Stockholm .