Santa Maria Secondary School in Sintra belongs to the group of pavilion-based schools built during the third phase of school construction. It was opened in 1969. The fact that surface area expansion of the school was impossible due to lack of space and the glaring need for expansion led to the demolition of a number of single-storey constructions to make way for new buildings and the creation of a structure that transforms the whole space into patios connected to the buildings that are prolonged in the interior spaces.
The intervention in the school maintained the two-storey buildings and a more recent pavilion. One of the new pavilions creates a new front facing the street and houses some of the functions that serve the community, such as the library and multipurpose hall. Another adjacent pavilion houses the new laboratories and the covered games field with new support facilities and a gymnastics hall.