The Sistine Chapel, originally called Chapel of Sixtus, is one of the rooms of the Papal Vatican Palace. At present, it is part of the Vatican Museums. It is in the Sistine Chapel, traditionally since the fifteenth century, the cardinals gathered in conclave to elect the new pope (conclaves are also being held in the Cappella Parva and the Quirinal Palace) and necessarily from the apostolic constitution Universi Dominici Gregis enacted by John Paul II in 1996.