 The pope then sent him as nuncio to the court of King Francis I of France.He was taken prisoner along with that monarch at the Battle of Pavia in 1525, and was released only on payment of a heavy ransom.He was subsequently employed on various papal missions, especially to Germany, but was unsuccessful in preventing the German princes from making a truce with the reformers, or in checking to any extent the progress of the reformers' doctrines.