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Events on Thursday 25 October 1810 1
1810Final Decline of George III's SanityThe king's relapse into mental illness triggers a constitutional crisisKing George III of Britain suffered a final, permanent relapse into mental illness, worsened by grief over the death of his daughter Princess Amelia. Parliament spent months debating how to provide for government given the king's incapacity. The dispute was resolved by the Regency Act of February 1811, which installed the Prince of Wales as Prince Regent.