Cardinal Tarcisio Bertone, the Archbishop of Genoa and a possible successor to the Pope, has been appointed by the Vatican to rebut what the Catholic church calls the "shameful and unfounded errors" contained within The Da Vinci Code. He is organising a series of public debates focusing on the conspiracy theories and what the Vatican sees as the blurring of fact and fiction at the heart of the thriller, the first of which will be held in Genoa tomorrow.