Stove and chimney installed at Sistine Chapel ahead of papal conclave

Vatican workers prepare and install a stove and chimney at the Sistine Chapel in preparation for the conclave which is to begin on Wednesday 7 May. Cardinals vote in secret in the chapel for a new pope and reveal to the waiting world the outcome by burning the ballots in a special stove, with the chimney emitting black smoke if no one has been elected, or white smoke if there is a new pope.