He was succeeded by his third but eldest surviving son, the third marquess. The third marquess was prime minister three times, from 1885 to 1886, 1886 to 1892 and 1895 to 1902 and also served four times as foreign secretary. His time as prime minister coincided with a great expansion of the British Empire. Lord Salisbury is also remembered as an adherent of the policy of "splendid isolation", the desire to keep Great Britain out of European affairs and alliances. He was also the last British prime minister to serve from the Lords Salisbury was offered a dukedom by Queen Victoria in 1886 and 1892, but declined both offers, citing the prohibitive cost of the lifestyle dukes were expected to maintain.