On Friday morning, May 2, Vatican workers were seen hoisting a chimney onto the roof at the Sistine Chapel, according to photos and video taken by Reuters. The chimney will soon be used to display the smoke from burnt ballots during the conclave to elect Pope Francis’ successor.

Vatican firefighters fitted the Sistine Chapel chimney in place ahead of the election of Pope Francis’ successor. White smoke will signify when a new pontiff has been chosen.

The famous chimney that will signify to the world the election of a new pope has been installed on the roof of the Sistine Chapel ahead of the conclave next week. Vatican firefighters were seen fixing the chimney, which is a key moment in the preparation for the May 7 vote to name Pope Francis ’ successor.