Sedia gestatoria an elaborate variation on the sedan chair. Two large fans ("flabella") made of white ostrich feathers —a relic of the ancient liturgical use of the "flabellum", mentioned in the "Constitutiones Apostolicae"— were carried at either side of the "sedia gestatoria". The ceremonial throne was mainly used to carry popes to and from papal ceremonies in the Basilica of St. John Lateran and St. Peter's Basilica. The "sedia" was used as part of papal ceremony for nearly a millennium. Its origins are sometimes thought to date back to the Byzantine Empire where Byzantine emperors were carried along in a similar manner,
Flabellum museum of the University of Pennsylvania. The spread is formed of great ostrich plumes tipped with peacock feathers; on the palm (base of the fan) are the arms of the Holy See, worked in heavy gold on a crimson field, the tiara being studded with rubies and emeralds. The new pair of flabella is on display in the Vatican museum. Lisbon Patriarchal Cathedral also holds two Flabella and one Sedia Gestatoria in its museum. It is thought the right of the Cardinal patriarchs to use such honour was granted after the efforts of king John V of Portugal that obtained