The Town Hall of Polanco, in collaboration with the Solvay Ensemble Choir and the company Solvay, organises once again this important International Coral Cycle that will host prominent choral groups from within and outside our region. This musical event, which has been held annually with great success, is now in its thirty-third edition. The performances will take place at the church of San Pedro Advíncula, on the weekends of October, at 20:00. In addition to the choirs from the municipality, important groups from Cantabria (Coral de Torrelavega, Young Choir of Santander, Coral Adamar and Santa María de Solvay) will participate. The "Sola" Youth Choir from Latvia will also perform. The Solvay Ensemble Choir will participate in the Coral Cycle Mass that will be held on Sunday, 12th October, the feast of the Virgin of the Pillar, at 12 in the morning.