Eight columns of yellow marble, from Verona, support the baldacchino over the high altar, and others, white and pink, from Norway, support the organ galleries.
Behind the baldacchino the crypt emerges above the floor of the sanctuary, and the podium thus formed is broken in the middle by the steps that lead up to the retro-choir. The curved wall of the crypt is lined with narrow slabs of green carystran marble. Opening out of this crypt is a smaller chamber, directly under the high altar. Here are laid the remains of the first two Archbishops of Westminster, Cardinal Wiseman and Cardinal Manning. The altar and relics of Saint Edmund of Canterbury occupy a recess on the south side of the chamber. The little chapel of Saint Thomas of Canterbury, entered from the north transept, is used as a chantry for Cardinal Vaughan. A large Byzantine style crucifix, suspended from the sanctuary arch, dominates the nave.