Of all the Aalto work I saw in Finland the Church of the Three Crosses touched me the most. I will post some photographs of the interior on another day, but the teasing coincidence and separation of interior and exterior ideas is one of the building’s pleasures.
Many of the exterior walls harbour the sliding walls in the interior. These allow the sacred part of the church to co-opt the spaces that are normally used for community activities on occasions when there are large congregations.
In the stereoscopic view you can see the space between the interior and exterior windows.