The basic principles of the design encompass a sensitive approach to the site, interaction with the existing religious activities and an architecture that uses simple and yet grand means to evoke the desired religious effect. Two basic elements, a 125m diameter circle and a linear element in the form of two large span (80m) beams intersecting it, are the geometric shapes that dominate the architecture.

A symmetrical layout has been chosen for symbolic, aesthetic and functional reasons due to the size of the building, so as to enhance monumentality and the closeness of the congregation to the Presbytery.

The building is developed on two levels. The main ground level gently rises from the existing square.

The Chapels in front are developed underground so as not to exceed the floor level of the square and impede the monumental relationship of the main structure and the square. Other auxiliary spaces are also entirely developed underground with connecting ramps and stairs to the main areas of circulation.

The Church has a recessed main entrance on the level of the square. Access ramps, defined by the two side walls and the two centrally located shallow reflecting pools contribute to a gradual transition from the open, inevitably noisy public space of the square, to the underground Chapels and confession areas, preparing the visitors for contemplation and prayer.

2. Function

Functionally, the main interior space, which further to its function as a Church can also be used for assemblies, can be divided into two zones. Accordingly, the hall can be used either for a smaller number of up to 3,000 or to its full capacity of 9,000 persons.