Listen to Andrea Chénier, Act 2: Roucher? ... Credo a una possanza arcana online. Andrea Chénier, Act 2: Roucher? ... Credo a una possanza arcana is an English language song and is sung by Fiorenza Cossotto, Mariano Caruso, Orchestra Dell'accademia Nazionale Di Santa Cecilia and Gianandrea Gavazzeni. Andrea Chénier, Act 2: Roucher? ... Credo a una possanza arcana, from the album Giordano: Andrea Chenier, was released in the year 2013. The duration of the song is 4:25. Download English songs online from JioSaavn.