The quarry at Braga did not offer stone. It offered a million cubic metres of resistance — a material so dense that blasting it out became an act of excavation and of construction in the same breath. Eduardo Souto de Moura folded that granite back into the stadium wall, leaving the rock face as architecture. Nothing was added. Nothing was wasted.
This is the logic of tectonic building: the structure is not a frame hung with skin, but a continuous mass whose weight is the argument. Concrete, timber, steel — each carries a load, and that load is the building's meaning. The architect's job is not to disguise mass but to direct it, to make gravity legible in the joints and seams between materials.
"Stone is not a surface. It is a duration. To build with granite is to commit to a timescale measured in centuries, not quarters."
— Ana Ferreira, The Slow Architecture
The board-marked concrete of the Casa das Histórias carries the same principle at a different scale. The striations are the memory of formwork, not decoration. To erase them would be to hide the labour.