of St. Peter. It is a Byzantine throne with framed fragments of acacia wood, encased in the oak carcass and reinforced with iron bands. It was long believed to have been used by the Apostle Saint Peter, but the Holy See recognises that the chair was a gift from Holy Roman Emperor Charles the Bald to Pope John VIII in 875. Several rings facilitated its transportation during processions. Pope Alexander VII commissioned Bernini to build a monument to display this relic in a triumphant manner. Bernini's gilded bronze throne, richly ornamented with bas-reliefs, encloses the relic. On January 17, 1666, it was solemnly set above the altar of Saint Peter's Basilica in Vatican City. Greater than life-sized sculptures of four Doctors of the Church form an honour guard: St. Ambrose and St. Athanasius on the left, and St. John Chrysostom and St. Augustine on the right. Celebrated on February 22 in accordance with the calendar of saints, the Feast of Cathedra Petri (the Feast of the Chair of Peter the Apostle) honours the founding of the church in Rome and gives thanks for the work of Saint Peter. Chair of Bishop Maximianus A fifth- or sixth-century bishop's throne decorated with elaborate ivory carving is preserved in the sacristy of the cathedral at Ravenna. It bears a monogram in front, "Maximianus ep.", which gave it its name. The identity of the bishop is given by the 1908 Catholic Encyclopedia as Maximianus of Constantinople (d. 431), considered as more likely than Maximianus of Ravenna (d. 556). Chair of St. Augustine The Chair of St. Augustine represents one of the most ancient extant cathedrae in use. Named after the first Archbishop of Canterbury, St. Augustine of Canterbury, it is made of Purbeck Marble or Bethesda marble and dates to sometime between the 6th and 12th centuries. Those who argue for an older date suggest that it may have been used to crown the kings of Kent. Canterbury Cathedral, in which the cathedra is housed, maintains that the chair was once part of the furnishings of the shrine of St. Thomas Becket, since dismantled. Since the Middle Ages, it has always been used in the triple enthronement of an Archbishop of Canterbury. He is seated on the throne in the quire as Diocesan Bishop, in the chapter house as titular abbot, and in St. Augustine's chair as Primate of All England. This is the