St Teilo's Church in Wales High School on Llanedeyrn Road in the Pen-y-Lan area of Cardiff was built in the 1960s. In September 2013 St Teilos High School moved from its location on Llanedeyrn Road into new buildings at the playing fields of former Llanedeyrn High School, delivered under Welsh Government's 21st Century Schools Programme. A new Welsh-medium comprehensive school, Ysgol Gyfun Gymraeg Bro Edern, opened in 2012, initially on the same site as Ysgol Gyfun Glantaf, before occupying the former site of St Teilo's Church in Wales High School on Llanedeyrn Road from 2013-14.

M. Powel, RCAHMW. July 2024.

Sources: 'Two Cardiff Welsh-medium schools to share same site for a year', WalesOnline, 25 October 2011; 'St Teilo's Church In Wales High School', Austin-Smith:Lord