Gloucester the remains (a gateway and some walls) of Llanthony Secunda Priory, a cell of the mother abbey in the Vale of Ewyas, Monmouthshire, which in the reign of King Edward IV became the secondary establishment. The Three Choirs Festival, originating in the 18th century and one of the oldest music festivals in the British Isles, is held in Gloucester every third year, the other venues being Hereford and Worcester. Gloucester hosted the festival in 2016, and it is next due in the city in 2019. The city's main theatre and cultural venue is the Guildhall. The Guildhall hosts a huge
Worcester blind and partially sighted pupils from the ages of 11 to 18. Worcester is also the seat of three independent schools. The Royal Grammar School, founded in 1291 and Alice Ottley School merged in 2007. The King's School was re-founded in 1541 under King Henry VIII. St Mary's School, a girls' Catholic school, was the only remaining single-sex independent school, but closed in July 2014. Other independent schools include the Independent Christian school, the River School in Fernhill Heath and New College Worcester for the blind and partially sighted. Every three years Worcester becomes home to the Three Choirs Festival,