The apse is consecrated to Our Lady, for whom Gaudí felt particular devotion. It is built on top of the crypt and follows its half circumference shape. Between the walls are seven apsidal chapels with slender windows and pointed arches that recall the Gothic style which Gaudí perfected.
A number of sculptures are arranged on the exterior, dedicated to the founders of religious orders, such as St Antony, St Benedict, St Scholastica, St Bruno, St Francis, St Elias and St Clare; the last has already been set in place. Above the windows are a number of gargoyles which pour out the surplus rainwater that falls on the chapels.