Pneumatics
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Pneumatics is a branch of engineering that makes use of gas or pressurized air.
Pneumatic (compressed-air) fireless locomotives like this were often used to haul trains in mines, where steam engines posed a risk of explosion. This one is preserved H.K. Porter, Inc. No. 3290 of 1923.
A pneumatic butterfly valve
De architectura
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De architectura is a treatise on architecture written by the Roman architect and military engineer Marcus Vitruvius Pollio and dedicated to his patron, the emperor Caesar Augustus, as a guide for building projects. As the only treatise on architecture to survive from antiquity, it has been regarded since the Renaissance as the first known book on architectural theory, as well as a major source on the canon of classical architecture.
A 1521 Italian language edition of De architectura, translated and illustrated by Cesare Cesariano
Manuscript of Vitruvius; parchment dating from about 1390
Greek house plan after Vitruvius
The Pont du Gard Roman aqueduct in southern France