The Duke was to have sat with his back to the great 30-tonne marble bust of his vanquished foe Louis XIV, positioned high above the south portico. Here the defeated King was humiliatingly forced to look down on the great parterre and spoils of his conqueror (rather in the same way as severed heads were displayed generations earlier). The Duke did not live long enough to see this majestic tribute realised, and sit enthroned in this architectural vision. The Duke and Duchess moved into their apartments on the eastern side of the palace, but the entirety was not completed until after the Duke's death. The palace has been Grade I listed on the National Heritage List for England since August 1957. The palace chapel, as a consequence of the Duke's death, now obtained even greater importance. The design was altered by the Marlboroughs' friend the Earl of Godolphin, who placed the high altar in defiance of religious convention against the west wall, thus allowing the dominating feature to be the Duke's gargantuan tomb and sarcophagus. Commissioned by the Duchess in 1730, it was designed by William Kent, and statues of the Duke and Duchess depicted as Caesar and Caesarina adorn the great sarcophagus. In bas relief at the base of the tomb, the Duchess ordered to be depicted the surrender of Marshal Tallard. However, the theme throughout the palace of honouring the Duke did not reach its apotheosis until the dowager duchess's death in 1744. Then, the Duke's coffin was returned to Blenheim from its temporary resting place, Westminster Abbey, and husband and wife were interred together and the tomb erected and completed. Now Blenheim had indeed become a pantheon and mausoleum. Successive Dukes and their wives are also interred in the vault beneath the chapel. Other members of family are interred in St. Martin's parish churchyard at Bladon, a short distance from the palace. The internal layout of the rooms of the central block at Blenheim was defined by the court etiquette of the day. State apartments were designed as an axis of rooms of increasing importance and public use, leading to the chief room. The larger houses, like Blenheim, had two sets of state apartments each mirroring each other. The grandest and most public and important was the central saloon "("B" in the plan") which served as the communal state dining room. To either side of the saloon are suites of state apartments, decreasing in importance but increasing in privacy: the first room "("C")" would have been an audience chamber for receiving important guests, the next room "("L")" a private withdrawing room, the next room "("M")" would have been the bedroom of the occupier of the suite, thus the most private.