St James's Palace held the first playing of the wedding anthem of Princess Anne, and though no longer the the principle residence of the monarch, it is still the ceremonial meeting place of what group?
Wedding anthem for Princess Anne: The Wedding anthem for Princess Anne, HWV 262, This is the day which the Lord hath made, is an anthem for vocal soloists, chorus and orchestra by George Frideric Handel. St James's Palace:  Located in the City of Westminster, although no longer the principal residence of the monarch, it is the ceremonial meeting place of the Accession Council and the London residence of several members of the royal family.
i don't know