Sorry to go all fine arty on the reader, but my affection towards current fine art trends are somewhat jaded. However, for the artists of the Renaissance, beauty was a consequence of harmonic proportion.
The aesthetic appeal of any entity, - be is man made, or natural - could, they believed, be traced to the perfect balance among its structure.
These men also believed that the ancients has possessed the secrets of true proportional harmony, and since the rules were specifically mathematical, they sought to draw out some truth concerning the many thoeries. By studying, measuring, and analysing the surviving buildings of ancient Rome, and combing the works of the roman writer Vitruvius.


Also new trends were being set about this time, as instead of anonymous craftsmen offering their services to the glory of God, as like in the Middle Ages, instead we had artists now with a sensse of individualists with their own beliefs and skills to use in practice.
Francesco is remembered chiefly as an architect and an architectural theorist. He translated Vitruvius and wrote an original work on architecture
, Trattato di architettura civile e militare, which discusses city planning and military architecture, anticipating some of the theories of the high Renaissance. By 1477 he was in the service of
Duke Federico da Montefeltro, in Urbino, where he may have participated in the design and decoration of parts of the palace of Urbino, and built 136 military fortresses.

His architectural masterpiece is Santa Maria del Calcinaio, Cortona (commissioned 1484), which, however, is now greatly altered. As a sculptor he is best known for four bronze figures for the high altar of Siena Cathedral (1489–97) He also designed fortifications, battle machinery, and weapons and is thought to have originated the land mine.
Which can be linked with the domino effect catastrophe theory. Geometry and mathematical precision has always been the fundamentals in which deeper human consciousness and elevated sense of higher communication, sharing one message, or perspective of compositional elements that they knew pre-existed.
Peoples perception changed forever.