 This period brought many changes to the school buildings, with the acquisition of Craigmillar House in 1962, Craigmillar Park Church in 1965 (now Buchanan House), Senior College in 1983 and Muirhead House in 1984.The building of Matthew House was completed in 1972, and extensive refurbishment work was carried out on the Pavilion and the science laboratories.In 1965 the school celebrated its 75th anniversary, and to commemorate this the daughters of Mr and Mrs Buchanan donated a plaque.