Simply put, a conclave is the assembly of cardinals that elects a pope. The word itself comes from the Latin "com" and "clavis," meaning "together" and "key," respectively – highlighting the absolute, behind-closed-doors secrecy with which the cardinals conduct their discussions and balloting.

Wearing bright red vestments, the cardinals processed down the central aisle of the basilica as the Sistine Chapel’s boys’ choir sang. They took up their seats around the main altar, which lies above the traditional burial place of St. Peter, considered to be the first pope.

The Catholic Church will soon begin the highly choreographed process of choosing its new leader following the death of Pope Francis. Follow here for the latest news from the Vatican.