1400 Guineas Stakes 1400 Guineas Stakes The 1400 Guineas Stakes was a flat horse race in Great Britain open to thoroughbreds aged four years. It was run at Newmarket and was one of the most important races of the second half of the 18th century. The 1400 Guineas was established in 1757 to be first run on the Monday before the first Thursday in October 1758. It was established by the 2nd Marquess of Rockingham, Marquess of Granby, 2nd Earl of Northumberland, 1st Earl of Gower, Sir James Lowther, Thomas Panton and Jenison Shafto. They agreed the race was to be run over
Commonwealth Cup (horse race) races in Europe. The Diamond Jubilee Stakes, run over the same course and distance at the same meeting, was closed to three-year-olds at the same time. The new race was subsequently named the Commonwealth Cup and the Buckingham Palace Stakes was removed from the Royal Ascot meeting to make room for the new race. ---- Commonwealth Cup (horse race) The Commonwealth Cup is a Group 1 flat horse race in Great Britain open to horses aged three years. It is the only Group 1 flat race in Great Britain exclusively for three-year-olds that allows geldings to compete and the first