Vatican firefighters have installed the all-important chimney on the roof of the Sistine Chapel ahead of next week’s conclave to select a new pope.

The temporary chimney, from which black smoke issues until a pope is elected, at which point white smoke pours forth, was installed on 2 May.

The installation of the chimney is a key step in the lead-up to the conclave, along with officers from the Swiss Guards and the Vatican Gendarmerie, the sovereign nation’s tiny police force, sweeping the famous frescoed chapel for listening devices and bugs, reportsthe Daily Telegraph.