Corpus Christi Roman Catholic High School (formerly Lady Mary, Welsh: Ysgol Uwchradd Corpus Christi) is a voluntary aided Roman Catholic secondary school located in Lisvane, Cardiff, Wales.

[3][4] Corpus Christi was founded in 1987, having originally been called Lady Mary High School.

Lady Mary High School originally included its own Sixth Form college.

However, the school does not have a sixth form so pupils go to St. David's Catholic College for further education and for some vocational courses at GCSE.

In 2015, there were 1042 students enrolled at the school, a slight increase on previous years.