Two thousand years ago, Marcus Vitruvius Pollio articulated a set of design principles he deemed as necessary to develop a well executed building: firmitas, utilitas, and venustas.
Firmitas (Firmness, Durability) – It should stand up robustly and remain in good condition.
Utilitas (Commodity, Utility) – It should be useful and function well for the people using it.
Venustas (Delight, Beauty) – It should delight people and raise their spirits.