The rough oil sketch is in a different category from the well known, very finished views of architecture.
The artist himself may have felt that the life of the subject, the gothic church, is more real when done in a more sketchy fashion which he made in direct contact with both nature and the atmosphere or at least, with a fresh memory of it in his mind. The robust trees, sans leaves, are arranged rhythmically across the canvas, the distance between the trees is enough to give emphasis to the vertical architectural structures beyond.
Galicano does not surrender himself to the architectural detail. The outline of the slender spires have totally taken over the canvas. He concentrates on the illusion of static space rather than the depiction of dynamic architectural details.