Today, cardinals will form their conclave in the Sistine Chapel, beginning a mysterious process held in the strictest secrecy. Here, the Mirror looks at five things you likely won’t know about this time-honoured traditionToday, cardinals will form their conclave in the Sistine Chapel, beginning a mysterious process held in the strictest secrecy. Here, the Mirror looks at five things you likely won’t know about this time-honoured tradition