The Royal Grammar School (RGS), Newcastle upon Tyne, is a coeducational private day school for pupils aged between 7 and 18 years. Founded in 1525 by Thomas Horsley, the Mayor of Newcastle upon Tyne, it received royal foundation by Queen Elizabeth I and is the city's oldest institution of learning. It is one of seven schools in the United Kingdom to bear the name "Royal Grammar School", of which two others are part of the independent sector.