The Royal Masonic School for Girls (RMS) is an independent school in Rickmansworth, Hertfordshire, England, with day and boarding pupils. The school was instituted in 1788, with the aim of caring for the daughters of poor Freemasons. In 1978, the school opened to girls beyond the daughters of non-freemasons. The school opened in 1789 with fifteen pupils in Somers Town, St Pancras, Middlesex. The school has moved between premises three times, twice within London and in 1934 to Rickmansworth in Hertfordshire, where it still is today.