As the English overseas possessions and later British Empire expanded, the colonial governments remained subordinate to the imperial government at Westminster, and thus the Crown was still ministered to only by the Imperial Privy Council, made up of British Ministers of the Crown. When Canada became a Dominion in 1867, however, a separate Canadian Privy Council was established to advise the Canadian Governor General on the exercise of the Crown prerogative in Canada, although constitutionally the viceroy remained an agent of the British government at Whitehall. After that date, other colonies of the empire attained Dominion status and similar arrangements were made.