Robert Cecil, 1st Viscount Cecil of Chelwood, English lawyer and politician, Chancellor of the Duchy of Lancaster, Nobel Prize laureate (born 1864)

Edgar Algernon Robert Gascoyne-Cecil, 1st Viscount Cecil of Chelwood,, known as Lord Robert Cecil from 1868 to 1923, was a British lawyer, politician and diplomat. He was one of the architects of the League of Nations and a defender of it, whose service to the organisation saw him awarded the Nobel Peace Prize in 1937.

The Chancellor of the Duchy of Lancaster is a ministerial office in the Government of the United Kingdom. Excluding the prime minister, the chancellor is the highest ranking minister in the Cabinet Office, immediately after the prime minister, and senior to the Minister for the Cabinet Office. The role includes as part of its duties the administration of the estates and rents of the Duchy of Lancaster.

The Nobel Peace Prize is one of the five Nobel Prizes established by the will of Swedish industrialist, inventor, and armaments manufacturer Alfred Nobel, along with the prizes in Chemistry, Physics, Physiology or Medicine, and Literature. Since March 1901, it has been awarded annually to people who have "done the most or the best work for fraternity between nations, for the abolition or reduction of standing armies and for the holding and promotion of peace congresses." The Oxford Dictionary of Contemporary History describes it as "the most prestigious prize in the world."