When the cardinals meet for the conclave, they gather in the Sistine Chapel. All cardinal electors must swear an oath of secrecy and vote by secret ballot. A two-thirds majority is needed to elect a new pope, and campaigning is part of the process, though it should not appear so.

The funeral of Pope Francis gave Catholics across the globe the chance to bid farewell to a beloved pontiff – and for world leaders to rub shoulders at a fraught time for international diplomacy.