The church is located in a village of rural characteristics in extremely difficult terrain, topographically complex: a hill surrounded by its main access road, which passes in front and laterally.
There is another access, located on the opposite side to a different dimension, so the architect had to shape this field completely slipped.
According to the same Siza was very helpful the presence of a very beautiful building but not geometrically precise, it was the only solid element in its area, the building stands behind the hill where the church and therefore the analysis topography, sought to relate much to this volume, which is very notable, placing the church at right angles, taking the hill in a symmetrical way.
You can access the raised platform in the courtyard of the church via a ramp from the east or a ladder from the west, both approaches are consistent with the disposition of city streets.
There is also a shortcut to the funeral chapel from adjacent land, owned by the Holy House of Mercy.
The architect takes as its fundamental premise for this project sees the debate he raised on the area of the church. He said the major issues affecting the space liturgy of the church are in a period of instability or uncertainty.
Siza note the existence of a first phase in which the preponderant in most of the projects is a sense of unity of the assembly with the celebrants and good visibility: called as a democratic space and the solutions were tending toward an amphitheater.
The responses to the changes that dominated council was considering the church as an auditorium, which according Siza lose some of this makes the atmosphere inside the churches, from their point of view can not lose all that generated these historic buildings .
He opted for a longitudinal plan, which has much to do with the feeling of losing something of what was to have been maturing for centuries. As for the expression of the church did not address in a special way this type of project: building a church, religion, spirituality .... No, the church was designed from what really is the space of a church and everything else (atmosphere , spirituality, etc..) came from there.