EWTN tells us the feast of The Chair of Saint Peter the Apostle has a rich history dating back to the 3rd century, and it commemorates the bishop's authority as the successor of the apostles. In the video below we get a closer look at the wooden throne in Saint Peter's Basilica, encased in bronze by John Lorenzo Bernini, and given to Pope John VIII in 875 and how the pastoral responsibility that Christ gave to Peter is still relevant today.
Why is a Chair Celebrated at the Vatican - Video by EWTN
EWTN on the Feast of the Chair of Saint Peter and the papacy.