Queen Victoria replaced him. Salisbury remained prime minister for the remainder of Victoria's reign. On 23 September 1896, Victoria surpassed her grandfather George III as the longest-reigning monarch in British history. The Queen requested that any special celebrations be delayed until 1897, to coincide with her Diamond Jubilee, which was made a festival of the British Empire at the suggestion of the Colonial Secretary, Joseph Chamberlain. The prime ministers of all the self-governing Dominions were invited to London for the festivities. One reason for including the prime ministers of the Dominions and excluding foreign heads of state was to avoid having to
Diamond Jubilee of Elizabeth II international event of the jubilee celebrations was the Diamond Jubilee Pageant, also branded "The World Comes to Windsor", a cavalcade held at Windsor Castle to celebrate the Queen's visits to and tours of over 250 countries, as well as her passion for horses. The show, which featured 550 horses and 1,100 performers from around the world, was performed in the evenings between 10 and 13 May, after the daytime events of the annual Royal Windsor Horse Show had taken place. The Queen attended the final night. On 18 May, the Queen hosted an informal lunch at Windsor Castle for more