Tintinnabulum 宗座铃
A Tintinnabulum is a bell mounted on a pole, placed in a Roman Catholic Basilica to signify the church's link with the Pope.
The tintinnabulum consists of a small gold bell within a golden frame crowned with the papal tiara and Keys of Heaven. If the Pope was to say Mass within the Basilica, the tintinnabulum would be used to lead the very special procession down the shrine's aisle. But now these symbols are not mentioned in the **** Vatican directives.