The word "universe" means the general assemblage of all nature, and it also means the heaven that is made up of the constellations and the courses of… - Vitruvius

As for principles of law, he should know those which are necessary in the case of buildings having party walls, with regard to water dripping from the eaves, and also the laws about drains, windows, and water supply. And other things of this sort should be known to architects, so that... they may be careful not to leave disputed points for the householders to settle after the works are finished, and so that in drawing up contracts the interests of both employer and contractor may be wisely safe-guarded.

The proper form of economy must be observed in building houses for each and every class.

All machinery is derived from nature, and is founded on the teaching and instruction of the revolution of the firmament.