The drawing that Gaudí did of the large windows was evolving from the initial neo gothic to the ellipsoidal drawings with various alternatives.
These drawings can be observed in many of the parts of the building. In the cloister it is possible to see pointed windows and trilobulated pediments, in the exterior walls neo gothic large windows, rose windows, ellipses, rounds, longitudinal windows, etc. in the transept enormous rose windows with spectacular colours with delicate intensity shades, in the apse, in the Glory façade and also some of not started ones in the base of the main dome, that will be of great size.