Following the death of Pope Francis, 135 cardinals, including four Canadians, will gather at the Vatican for a conclave to elect a new pope, with candidates required to be male baptized Catholics. Cardinal electors must be under 80 years old to vote, and the conclave will continue until a candidate receives a two-thirds majority, indicated by white smoke from a chimney. Among the Canadian cardinals participating are Thomas Collins, who served as Archbishop of Toronto, and Michael Czerny, known for his work in social justice and mediation efforts in Central America.