Il primo [-secondo] libro d'architettura
Sebastiano Serlio's architectural treatise, printed in Paris in 1545 for builders, draughtsmen and students of geometry and perspective. The four diagrams are plain line-engraved geometric constructions: a lettered square with diagonals, a cube drawn in one-point perspective with converging orthogonals, a rectangle divided by a diagonal, and a quadrilateral with a construction arc. A designer could draw on their clean, schematic logic for grid layouts, proportional systems, and vanishing-point compositions.
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