It is a meeting of cardinals specifically to choose a new pope. Only cardinals who are under the age of 80 are eligible to vote 鈥 there will be 118 of them in next month鈥檚 conclave. The word conclave originates from the Latin cum clavi 鈥 with a key 鈥 because cardinals used to literally be cloistered behind locked doors until they came to a decision.