A history of political interference in these elections and consequently long vacancies between popes, and most immediately the interregnum of 1268–1271, prompted the Second Council of Lyons to decree in 1274 that the electors should be locked in seclusion cum clave (Latin for "with a key"), and not permitted to leave until a new Bishop of Rome had been elected. Conclaves are now held in the Sistine Chapel in the Palace of the Vatican.