A Papal Coronation was a six-hour long ceremony in which the pope was crowned as head of the Roman Catholic Church (and before 1870, head of state of the Papal States). A three-tiered Triple Tiara or Papal Tiara was used in the ceremony.
... friction.
The device is covered by US patents 3,726,146 (1973) and 5,353,655 (1994) by L.A. Mishler and US patent 5,800,311 (1998) by P.S.Chuang.
Externa ...