The Royal Grammar School Worcester (also known as RGS Worcester or RGSW) is an eleven-eighteen mixed, independent day school and sixth form in Worcester, Worcestershire, England. Founded before 1291, it is one of the oldest British independent day schools. Until 1992 it accepted boarders. Boarding pupils would reside in Whiteladies House, a building that is rumoured to contain hidden treasure from Charles I from when he sought refuge there during the Civil War. It is now a day school. Tracing its origins back to the 7th century, it is the sixth oldest school in the world.