Squash historians assert that the game originated in the 19th century at the Harrow School, just outside London in England, as a derivative of the game of Racquets. The first recorded construction of purpose-built squash courts was at Harrow in the 1860s. It is possible that earlier squash courts were created at Harrow by sub-dividing a racquets court, which is almost exactly the size of three Squash courts (to allow more players on the courts at the same time).