Abstract: A folded architectural panel folded from a flat sheet, the panel having opposite longitudinal ends extending in a width direction, opposite lateral sides extending in a length direction and a depth perpendicular to the width and length directions. The panel includes a first downward fold adjacent one longitudinal end, extending in the width direction, and having opposite fold ends at the respective lateral sides of the panel; a second downward fold adjacent the other longitudinal end, extending in the width direction, and having opposite fold ends at the respective lateral sides of the panel; and a central upward fold at a central portion of the panel between the first and second downward folds; the first downward fold, the second downward fold and the central upward fold enable contraction of the opposite end folds towards each other to cause folding of the first and second end folds and an increase in the depth of the panel at the central portion.