Today, Thursday 5th December, rehearsals will begin for the IX Federico Ceballos Memorial in which, once again, Ariel Ramírez's Creole Mass will be performed. The concert will be next Friday 13th December, at the CHURCH OF SANTA MARÍA DE BARREDA, at 19:30. A large cast made up of choristers from different groups will participate, accompanying the Solvay Ensemble Choir. Various soloists and instrumentalists will also participate, along with the great Argentine maestro Pablo Mezzelani, all under the direction of Juan José del Valle.